They are all very good especially Mockingbird could last season(she was just nerfed) easily kill a whole team alone.
Mockingbird:
Bobbi used to be so broken imbalanced. Just to recently she would gain have 50% chance to get a turn when she changed class, something she does after being attacked. Then she changes to the counter class. So shes not really a generalist.
The nerf is that now she can only get 1 turn. This a huge thing, because she is pretty bugged, I would say bugged. She can changes class several times in one attack. For example Annulus Human Torch can summon his bugs at her after she attacks and while Captain America Counters her. So first she becomes an infiltrator and then change to a Tactician. This leads her to two swaps and possibly 2 turns. However, it was then nerfed so she can only gain 1 extra turn.
To me the real fix should be that she only swaps once per attack. Furthermore, if the user attacks with her and has her third ability on which makes her swap the to counter class before she attacks and then if that person has a counter like Cap and 2 passive guys who attack like Gambit and Human Torch, she can swap class 4 times in one attack... so yeah that was problem when she could gain all those turns. Now it just looks rideciulsly
But, it also ruins some strategy with her, I used to use her a lot and many times when I plan. I will attack Class X to get Class Y on her, Class A passive attacks her and she turns into Class B instead. Ruining my game plan. That is something that should be fixed.
Mockingbirds third ability also gives all enemies weak point(next attack is guaranteed to hit and is a critical) and its a quick turn. Furthermore her ultimate has deadly critical, so already of that it can deal huge amount of damage many times she can one shoot some characters.
However, her first ability is one of the best normal primary attacks in the game, dealing decent damage with 2 attack and it can deal up to 4 different debuffs. Then her ultimate has paragon exploiter which deals more damage per debuff. So with a good team its really easy to make her one shot anyone with her ultimate.
Her second ability is a weak attack with a stun, its decent. Having a stun never hurts.
Shes a strong character by her abilities. But, it is still her passive ability to change class which is the strongest point.
This means that she is always good in any battle in PvP as she can change to the most favourable class.
However, a good attacker can use this to her disadvantage for example first turning into a Bruiser to then one shot her with Blaster. She is a neat designed character, but personally I don't think it fit her comic powers at all. (shes more like Taskmaster right now)
Rogue:
Just like Mockingbird, Rouge adepts to the enemy class teams. So she is also not really a generalist she is more every class. Rouge is really good as she has no weakness at all. Mockingbird gets a weakness by turning into a class. Rouge instead of turning can absorb an enemy’s power. Which is how she should be working.
Rouge got some clear Ms.marvel abilities straight of, which at first seems lazy but. This is how she should be as she was for a long time when she had stolen to much of Carols identity. Those are kinda the same, her ultimate is an attack that gives her a double next turn. And it empowers her second and third ability so its really similar to Ms.Marvel (hmm which is now Captain Marvel in the comics - gief alt suit with that butch hair playdom)
And her first attack is the brawl a pretty pointless ability, it do have deadly critical. But the only usages of Brawl in a sense is when her second and third ability is on cooldown.
Her second ability then is the absorb power, which is really good. She gets the class bonus of what she uses it on. So for example if she uses it on a Tactician she gets 2 turns each turn...so its a lot better then the actual Class bonus as it need blaster and has to attack a blaster, she just gains 2 turn. Attacking a Infiltrator then gives her stealth and bonus in damage and so on.
She gains a more powerful version of a class bonus or the same but with no added weakness. And her third ability damage the enemy and heals her a lot. So she is a good damage dealer and hard to kill.
She is kinda weaker then Mockingbird as she as a more potential, but still shes really good. No weakness and that she then adept from their powers means she cant get into a bad fight in PvP.
Of course having both her and Mockingbird is a great combo to have a safe running team or
Beast:
Beast is the anti, anti tank. And he is also anti class changing so he really beats Mockingbird. One thing which is not so good with Beat is that because he is to counter tanks like Captain America and Hercules, so they cant protect and cant counter him. He very well counters Infiltrators as well. As he can stop them from being able to counter, so its kinda to good against a specific class.
Beat don't change like the other, he actually stays as a generalist instead his ability prevents other characters which gains the debuff generalized to be able to gain their bonus. Its also stealthy so he can do it on anyone and he cant get countered.
His third ability is ok, it makes him counter stuff. It works with his passive abilities, because on of his passive makes his damage increase if he don't attack. And the other one gives allies a chance to gain that their next attack will be a guaranteed hit and critical. Just like all other new characters its all about having good passives, and the second one is solid.
Furthermore his third ability is really an improved version of Cyclops as it also gives random buffs instead of as Cyclops who only gives Agile.
His second one is kinda strange, he puts a debuff on an enemy. And if that enemy does any attack he attacks them. Its subtitle so it also goes trough protective tanks. He is all about stealth and anti tank stuff.
Lastly then Beast got an unique attack that exploit protect....it deals more damage to a tank who is tanking. And removes that protect and the character cant counter, so he cant counter back. So its a devastating attack especially then for character who take no lower damage like Hercules but makes it up in counters. And of course it is great on any other tank.
I really like the idea of Beast, he is made to counter the meta game of mainly overused Captain America. So I think its a good idea, however I haven't actually seen any remarkable change on my own games at least.
There has a been a lot of anti tanks recently so I think they will be fewer and fewer...which leaves more Emma Frost Spot.
Agent:
Its the user-- who can do both damage or healing and stuff.
I mean really the Agent can do anything so cant relay fill that in her.
I would say one thing, at low levels to my experience the Agent is pretty bad and around level 60 when the Agent get all the good gadgets and full slotted suit etc. The Agent becomes the clearly strongest character.
Which feels wrong, but to sell those gold items---
Another thing is that, I think that the user should be able to not use the agent. The Agent would still be the strongest character, so I don't for see any money lose. But it would be more fun at the earlier stages of the game and much more potential teams could be created.
Summary:
Well they are all of max cost and overpowered
