Depends, I have been using Fei and Cammy since SF2T with Ryu since SF2HF
Abel is great vs someone not smart enough to know how to grab during the roll, does not know how to stand up while blocking, though his command grab and standing fierce and ultra is too good.
Cammy is great because of mid range mix into close range and the best focus attack I think, and if someone uses a focus attack you can cannon drill, spike, walk forward and grab, best walking speed, best anti air, arguably still the best forward low attack to Ibuki, when spaced right it is safe but at the same time its blockable while Ibuki’s does good damage while breaking focus attack, then again Cammy does have standing hooligan I guess. You wont make a good Cammy player unless you learn how to link cross over light kick, crouching light kick, crouching light punch, crouching light kick, heavy cannon drill. I like how cannon strike without ex is much harder to pull off, less spammers, counter ultra is terrible as is, old ultra has great range for good damage and good chip damage. The character by all means is weaker then the SF4 version, which was already the weakest form outside of original, but im just really good at spacing, timing, with a good focus attack and range is really all I need. Dudley has his counter, why can’t Cammy from MvC2? Or at least make the counter ultra useable after focus or able to be used when it connects with a focus breaker. Come to think of it, Cammy doesn’t have a focus breaker outside of grabing but I hardly have trouble using my focus back at them or just garbing with that walking speed.
At the same time, Cammy is hard to verse unless you know how Cammy works and your using a character your good at using.