We have not had a good offensive tackle since Peters left. The offense this year was crafted around a poor offensive line, and was rather effective for a while. The team has gotten progressively worse since Jauron left (I CAN'T BELIEVE I AM SAYING THIS) with a 3-4 concept that has been a mess, with the failure to keep quality players and bizarre drafting policy year after year.
I think the offensiveness weakness is not so much quarterback as it is offensive line and receivers, quality and depth. Fitz is an average qb... the tackle positions are considerably less than average.