Probably the focus will be on the 2012 (Freshman recruits) & 2011 (Sophmore) classes. I would expect that juniors & seniors will, for the most part, tough it out. Best guess.
There won’t be a huge amount of pressure for these ex-Lions to fit into another system since the expectation of playing time would be minimal.
Any player on scholarship will be able to keep their scholarship at Penn State even if they decide to stop playing. If I was a junior or senior and didn't have pro football potential, I's focus on school and forget football.