Here Oda shows what BM is capable of, letting her destroy multiple Supernovas without much effort.
That doesn't match her previous gag-portrayal one bit though (getting trolled by freakin Franky/Robin/Jinbei etc.).
This lack of consistency is just annoying. It really re-emphasizes the fact, that he massively nerfed her, just because he didn't know a better way to let the SHs escape from certain situations. Let's tell it how it is: That's simply not good writing.