I said back in 2009, that I didn't think the Cutler trade would work out because I didn't believe that Cutler was this top-level QB then and that the team would be significantly better with him than it was with Kyle Orton.
Orton was 21-12 as a starter in Chicago (64%). Cutler is 32-22 (59%). A base comparison, but it gets the point across.
I don't think the Cutler trade was a bad trade. But as I've suggested with the Jones trade and other personnel moves, it's simple physics: for every action there is an equal and opposite reaction. When you trade a bunch of draft picks to upgrade a single position that reaction often is a downgrade of multiple other positions. IMHO, that trade-off is almost never worth it. Few exceptions would be to get a rare talent like RG3 or Luck at QB. Other than that, teams should NEVER give up future #1 picks.
That was the issue I pointed out back in 2009. The Bears had a lot of aging talent on their defense, and without 1st round picks to replace them they could be in trouble. And if you intend to replace perennial Pro Bowlers and future HOFers, you MUST have 1st round picks to even have a chance at doing so. And even when you do, it's more than likely going to be Booger McFarland taking over for Warren Sapp, and thus it ain't gonna work out.
Melton, Paea, Nick Roach, McClellin, Chris Conte, D.J. Moore. Some of them can/will be good players. But they aren't going to be replacing Peppers, Idonijie, Briggs, Tillman, Urlacher, etc.