Isheem is probably the best run stuffing safety I've seen at Iowa State (may be showing my age a bit here) but has never really been much of a playmaker in the passing game iirc. Would not shock me if Freyler playing as much as he has had a little bit to do with Isheem leaving, although I'm sure he'll basically get to name the school he wants to play for and will likely want to be near his girlfriend and child if info I've seen on other threads is correct.
Freyler being as good as he has been already as a true freshman is pretty special. Taking any snaps away from a player as good as Isheem says a lot about where he is now and the potential he has moving forward.