Also there are just big time position groups that seem overall lacking in both elite prototypical blue chip prospects in general or legitimate depth: QB, WR, OT, TE, DL. Not a lot to be desired after 1-2 rounds.
But if you need RB, IOL, LBers, and DBs this is probably going to be a solid class for you and you'll still get some decent players further into the draft.
I think just a lot of people feel that the draft will fall off a cliff around the 4th- 5th round. That its more quality than quantity but the quality might be more relevant to lesser positions.