Here is my analysis of each listed 3* character:
Ragnarok: Although he sucks, I hope he remains as is because we often face him in PVE
Sentry: This is a perfect example of over-nerf. His character was a nice mixture of risk versus reward, similar to Patch but the devs not only raised the AP cost of his powers, they also lowered the damage to enemies and raised the self-damage. I hope we do not see any more over-nerfs with the upcoming balance changes.
Spider-Man: This character should be the focus of any 3* balance. He has been a consistently requested buff character but he is constantly ignored for reasons unknown. He did receive a nice cosmetic coat of paint in a character redesign but a tweak in his powers did not follow. It’s sad when every single other version of Spiderman including 1* Spidey is much better. I like the web mechanic of Miles and 1*, I would like to see a similar one applied. It’s okay if he’s mostly support but give him an offensive ability already!
Psylocke: I love Pyslocke as is but I would like to see higher damage for both red and black. Obviously her blue is horrible and no one uses it but it would be good to have the CD be 1-turn and either have her steal the up to 10AP of the strongest color or 5AP each of red and black. Many have suggested choosing a tile and she would steal the color of the tile, I like this too.
Colossus: I like his character but he’s been overshadowed by Luke Cage. His yellow should be reduced to 6AP, like Beast’s blue became usable at 6. Red should do slightly more damage and black is a cool concept that fits his character but too expensive when most abilities are cheaper than 14AP, this would be nice at 10AP.
Squirrel Girl: Drop the stupid “End the Turn”. Her protect tiles aren’t even strong enough to prevent much. Increase the protect tiles to 1000 each and that would be interesting!
Captain Marvel: I like her character and use her often, especially against protect tile spammers. She just needs increased damage on red and maybe black
The Punisher: Sadly my username is Punisher but I never use his character. He is extremely weak with all of his moves. Even if his damage was increased I still do not think I would use him. I have 5 covers waiting and I don’t even want to champ him.. that’s a problem.
Bullseye: He is my guilty pleasure! I pair him with Psylocke and Spidey. I can often take down huge PVE teams with his purple and black. His green is just so expensive and not usually useful. Lower the cost to 8AP and I would likely utilize it more but currently I don’t even bother matching green tiles.
Gamora: I like her black ability but she needs to tank everything but once it’s off I spam red like crazy. Her green is just too weak and expensive. Tweak the green and she is solid.
Daredevil: I think his abilities fit the character well. His purple needs a huge tweak though, especially since Bullseye does more damage and only 7AP compared to the expensive and less damage of DD’s purple. Keep the AP cost the same but have him remove ALL special tiles, including Trap tiles!
Storm: I love Storm and she was my favorite 1* character until they copied her for the 3* counterpart. She is great, even her yellow is useful for clearing out T/U’s for her green and black powers. The problem is her health is low and she tanks green. As a result I do not use her as much as I would like to.. I mostly use her against goons.
Mystique: Her moveset fits her character but like Sentry, she was over-nerfed on her blue. It’s too expensive for an ability that creates two colors I rarely get a match 4 or 5 from it. Lower the cost back or at least raise her health. Also her purple should always stun the target, not just at 5 covers.
The Hulk: Remove the self-damage and green drain on his red. Also make the red AOE damage. Otherwise he’s one of my most used 3* characters for the Anger tiles alone.
Beast: His last redesign made him very usable, especially with SW.. no change is required unless his yellow becomes true heal which would be awesome.
Where is Doc Ock? He needs help! Reduce his Blue and give him a usable green that does something good! I love his black skill.