I don't get the complaining about Acho at all. He's been very productive, especially as a 4th round pick, who was also listed as a DE. In fact Acho has outperformed many of the LB's selected prior to him and, other than top 10 picks Aldon Smith and Von Miller, is right there with pass rush sack numbers.
Here are Acho's, and the other LB's picked ahead of him, numbers:
Player, selection number, tackles, sacks total,
Jabaal Sheard, 37th pick, 109 tackles, 15.5 sacks
Akeem Ayers, 39th, 179 tackls, 8 sacks
Bruce Carter, 40th, 78 tack, 0 sacks
Jonas Mouton, 61st, 1 tackle, 0 sacks
Dontay Moch, 66th, no stats, more games suspended than tackles/sacks
Nate Irvin, 67th, 17 tackles, 0 sacks
Justin Houston, 70th, 122 tackles, 15.5 sacks
Martez Wilosn, 72nd, 29 tackles, 4 sacks
Mason Foster, 84th, 189 tackles, 4 sacks
Akeen Dent, 91st, 85 tackles, 0 sacks
KJ Wright, 99th, 163 tackles, 2 sacks
Sam Acho, 103rd, 58 tackles, 11 sacks
I don't really count Cody Brown and Schoefield as busts either. A better case can be made for Brown but he did have a major injury and Schoefield has also fought injuries as well.
A reach would have been taking Ansah if he had fallen or Jarvis Jones, who went 17th. Although I would not have been upset with Jones being the pick, the fact is he went 17 and would have been a reach/need pick at 7.