Yes, as awful as they were last year offensively, they were fifth in both YPG and PPG. With a new OC and a plug-and-play OT from the draft, it is not unreasonable to expect they will be a top five offense next year.
Also, Brad has ten draft picks. One will be used for an OT, and he will probably package some to move up, but it is likely that he can pick up two or three players who can make immediate contributions to the defense as well as a few depth players.