The other thing about the Clowney trade is TD must hit on the picks he as left. It really doesn't matter whether a deal is done or not. If you make the deal better players must be acquired whether a deal is done or not. Your still going to have to hit on picks. Hopefully with Pioli here a few gems will be found.
My general point over the past several days has been that it's easier to hit on 1st, 2nd, and 3rd round picks. After that, the game is much more of a lottery. There's obviously a great deal of uncertainty in the draft, but the higher picks you have, the better the odds of landing someone who can benefit your team.
The, "big four," are also gambles. A good number of top selections end up being average, or below average NFL players. From what I can tell, the best bet is to acquire as many 1st, 2nd, and 3rd round picks as possible. Giving up these picks significantly affects your ability to bring in talented young players.