Well, Murphy confirmed a few of the cast members who will be leaving after season three.
Lea, Cory and Chris are all definitely out, and according to Ryan, "[are] not going to be back at all."
I hate to be 'that guy,' but it'll be a long shot if I keep watching after season three. These are my three favourite characters, and I would need to be REALLY impressed by what they do next season in order to stick around. What do you guys think?
Source