I think the biggest problem starts and ends with coaching, we have now many players that play out of position and that is a problem itself. Than having young guys transitioning to the nfl and at the same time to a new position ... that isn't working well. You have only little time and a transition takes time, you set yourself up to fail. And that is what this Coaching staff does.
Nkemdiche is a 43 DT that maybe can play 34DE but apparently can't or isn't teached enough or both.
Cooper is playing okay now in Dallas, why did we have to put him in a position he never played before? Why?
Humphries is the only guy I understood the move, but nonethless playing him at RT showed he wasn't a great RT and as a coach normally you should see that. Ask for a RT and or trade a LT away, no need of having 2 good LT on the team and destroy the value of one, before last year we would have got a second rounder at least for Valdeheer, maybe a late first. Now, if we get something it would be nice.
But many things go downto coaching, if the coach tells the GM (hey your players are to dumb to get the execution) and the GM trusts the coach, this is what we are gonna see, a GM trying to draft and aqcuire players that don't pan out. GM has to trust somehow his coach but we see that BA isn't often trust worthy in his assetments of the talent...