That is an interesting point of view. But think about how many Offensive Lineman we have brought in through FA or the draft.
As bad as our front office might be a picking linemen, we are going on 10 years without having a great offensive line. Some of the guys have been awful, but others have gone elsewhere and started. There are 31 other teams in the NFL, yet our offensive line always tends to suck. It seems almost impossible.
Have you also noticed that teams with "bad offensive lines" typically have "bad quarterbacks". The offenisive line is easy to point to but I am not sure it is the whole problem. I think it has more to do with our offensive scheme or lack there of. Even going back to the days of Gregg. We are always way too predictable. How many times have you been sitting in the recliner at home and knowing the down and distance, be able to predict what the Bills offense was going to do. I know I have and I seem to be right about 70-75% of the time, and I am a fan. Someone like Bill Belichek, Steve Spagnolo, or Rex Ryan will probably by right 95% of the time. Pretty easy to defend a play when you already know what has been called. (Spygate jokes aside).
Ths Bills have not had a great offensive mind here in a very long time.