You can't complain about guys leaving early - when they aren't ready - in one post...and then trash another guy for coming back when he wouldn't have a pro career in another. Don't be hypocrites.
Its college football. Age matters. And these seniors returning are basically freebie scholarships. No harm roster spot.
I don't necessarily want this guy doing the same thing he did last year, but if he's coming back and open to moving around (I recall moving to EDGE was a possibility) than who cares? If he is still getting a ton of reps at traditional linebacker...maybe your younger heroes ain't all that.