Nerfing the SE flutters would be very unfair to a lot more people, especially since they are popular monsters to use even without Maeve. Maeve being a high speed monster with nullifying kill/knockback + focus is not something that’s healthy for the game, that’s the problem and it’s what should be dealt with. It also having high defence, instant shield all and insomnia make it particularly hard for other teams to counter.
I think that there’s a lot of strong aspects of Maeve that whichever nerf route they choose to take, there will still be a lot of reasons to use her in certain teams. She just needs SOMETHING taken away because right now there’s too much.