Considering the spirit of Sunny is that the characters don't grow and only worsen (even physically, aside from Mac getting jacked) I wonder if they couldn't figure out what to do with her as a shitty dirtbag character since the actual person lost a bunch of weight.
I mean, it wouldnt be unheard of for drugs to cause a weight loss. Artemis was no stranger. She could be crickets new pcp dealer. Or deal crack to Dee and Dennis. Hope she comes back next season. And cricket didnt transform at all this season! It was super solid overall, definitely the most consistent in years. Really enjoyed all of them.