At this rate I feel it's going to be a whitewash of what was previously a very solid cast
Ranked by likelihood of coming back:
Mary - no chance
Jen - can't see how she CAN even if she's vindicated of all crimes
Meredith - the slurring is getting worse and she seems more and more checked out as the episodes go on. Both with the show AND life in general
Jennie -

I had her ranked here anyway to be honest. I thought she could cling on if all the above left. She's inessential and now THIS
Whitney - she'll only go if pushed, but are the FBI after her now

Lisa - dunno
Heather - the GLUE