Muda, I dunno, I like crowd control characters. Being a regular old beat stick type of character can be fun at times, but I do enjoy those who utilize their abilities less for directly defeating their opponents with sheer force, but through tactical use of their skills and powers. Those who rely on CC and have generally non-offensive quirks are the best for that since they got to think smart.

I'm no GM, but I like your character. Personally I don't even know why or what sort of a bigger drawback the GM's would want; the fact that she isn't safe from her own powers seems like a pretty big deal to me. It just shows she can't be reckless with it or else she'll harm herself with it too, even if she can secret a fluid to break down the goop she makes.