But is flying a problem?
I'll use a knife fight as an analogy:
There is a knife fight. I've got a gun. I kill everyone that showed up with a knife. Me having a gun is a problem.
There is a knife fight. I've got a knife, but I can fly. I don't really have much of an advantage, if any. I'm limited by my knife skills; everyone else also has a knife. (For the purposes of this analogy being accurate, while flying it either becomes impossible or very difficult to use my knife)
There is a knife fight. I've got a knife, I can fly, and another guy has a gun. Me and everyone else with a knife gets killed. That guy having a gun is a problem.
And here is a visual aid:
Which one is not like the others?
We can bring FF's use of movement into this discussion, but it will only complicate the issue. Movement is not similar at all to something like range of effectiveness.