This was a god awful pick. As much as people pimp McClay, he has no idea what he's doing after round 1. If you can't hit on rounds 2 and 3, you will swim in mediocrity forever unless you make up for it in free agency or trades. Something Dallas does none of. Or has an elite QB and coaching staff to cover the warts, also something they don't have.
I got bored and looked at the roster because you constantly post this every year in draft threads. Their starting lineup currently is made up of the following guys drafted in the round noted:
QB - Rd 4; RB - 4; WR - 1, 3, FA; TE - 4; LT - 1; LG - FA; C - 4; RG - 1; RT - 1
DE - 2, 4; DT - 3, 3; LB - 1, 1, 4; DB - FA, 2; S - 6, FA
K - FA; P - FA
That's not nearly as bad as you want to make it out to be. Basically 18 of the starting 22 are Dallas drafted players with 12 of those 18 being drafted by Dallas outside of round 1. When you look through the backups, they are also full of mid/late round draft picks. That's also on a team that made the playoffs and didn't exactly suck. They have plenty of issues but your constant bagging on their draft abilities are a little misguided.