I'm indecisive whether to be aroused or or freaked out by my mental images right now...
But... okay apart from Luffy (and probably some giants) noone will be able to enjoy her extra curvy body very much. Too bad.
Even removing the size issues, there's still the Mermaid Problem in the first place.
Still, it might be interesting if they explore having a crybaby of that size near a fruit-user. If someone who's eaten a devil fruit is paralyzed in salt water, shouldn't tears that big be capable of stunning one for a while?