Abby's weight loss
I've read a few posts complaining about this. It's very easily explained if you paid attention. Noelle doesn't eat. After the first outing for coffee, Abby didn't eat while she was with her. This was noted in Abbys sarcastic comment about them being the perfect political prisoner because they act self righteous and starve. As the movie progresses, you see Abby and Noelle together more with means Abby is spending more time not eating....hence the weight loss.
I voted for Frenchie and Dia like a sex donkey on Xanax.