Ishaaq's natural position was DE, he never was a great fit at LB even in a 3-4. I think if they do find room for him he has a chance to salvage his career. Based on Fall reports last year the light had come on for him and he was ready to do some work. If he's in good shape this Spring/Fall and he gets the academics cleared I think they should bring him back. 5 spots is tight though...and we're possibly talking to transfers coming in. BK made it seem like Ishaaq's transition back to the team is not as easy academically as Russell's.
Among the 5 spots available for 5th years (And that includes the possible transfers) we're obviously taking Nick Martin, I would expect Farley to come back given his sacks and INTs last year. Golson will likely be back, unless he transfers after Spring. I think you have to bring Schmidt back, unless he pays his way again (BK said walk-on's scholarships are for 1 year only unless they're renewed). That leaves 1-3 spots available for other 5th years...and Kelly had good things to say about Grace. It would be nice to have Carlisle back, but the Slot should be filled. I think they'll let Hegarty go. It's going to be tight...