They're good against people you've conditioned, but against mashy people, they lose to weak attacks and such all the time. You really have to know what they're doing, or have a good read on it, for them to work. They look like OP crazy when opponents have no idea how to defend, but horrible when they catch on. They'd be very bad if that's all she had, but thankfully she has solid, full combo enders that lead to damage and knockdown.
Yeah, I can understand that, haha. Thankfully, enough years of other fighters taught me "Cr.MK is the real cancel tool!" and that's pretty much how I think here, with a side of "Heavies are awesome too, though!"
I love her ender variety, though. I like that I have some things that I can risk the timing on, to try to get more V gauge or something, and others I can just reliably do the damage and such, and start thinking about the next play. If her ONLY tool was QCF+K, P after stuff for followups, I'd be annoyed that my best followup was tied to JUST attack timing ALL THE TIME, y'know?
Freaks me out still that she can get QCB+K off standing light kick, lol. I keep thinking it'd never have the hitstun.