definitely, they have their weaknesses: Hayate has almost nonexistent delay, Ayane can't afford a mistake, Kasumi is unsafe, and Alpha has glass defense. You just gotta exploit them, which many people aren't strangely willing to do
The only way Alpha is really broken anymore, is in a way that hurts the character; her stun mix-up. Her K string doesn't stun anymore, so there goes one of the reliable mix-ups she has. Now she pretty much only have mid and high P's left to play with.. She has been nerfed into the ground, imo. But I still love her, and I'll still main her.
I've actually been interested in picking up Alpha. But Christie is most likely my next pick and I'll probably stick with her. I'm extremely disappointed in my Hitomi and Kokoro lol