Firstly, the spoiler lock is well over.
Secondly, Ciel does not need a nerf just because you struggled with it. I personally found Ciel quite easy as did quite a few other people. If your team can't beat Ciel then you might need to train up a new member. I know that gym leaders can be frustrating but people are going to struggle with different leaders based on their team. Ciel's team might be adjusted but not majorly nerfed. You've got a few months before E16 comes out- train up a poison type to deal with Mega Altaria. Or an ice type would help.
Also- you can use hold items. Acrobatics effects based on whether the pokemon using it has a hold item- not you. Acrobatics is boosted in the field though.
I know it can be frustrating but adapt and eventually you'll beat her.