All this Donald stuff seems destined to disappoint, there's no chance a 35 year old who has been away from the game for 2-3 years can come back and be a major piece of a team.
Best case scenario he'll be a nice rotational pass rusher playing like 15ish snaps a game, although he could also easily be guy who comes out hot but then flames out midseason because he's 35 and hasn't played football in a few years, or he could just be mostly useless from the jump.
Maybe "nice rotational pass rusher for 15 snaps a game" is all they need him for, but it seems like a bunch of hype for a likely minimal return.