Its 2010 all over again, little to nothing has changed on a bad offense.
Same QB as last year
Same WR's as last year
Same TE as last year
I'm hopeful that we'll see Henne take a step forward. Even if he only improves marginally, improved playcalling and a league average number of "dropped interceptions" would SERIOUSLY impact the offense. I'm not going to discuss Henne (no, really, I mean it this time), but playcalling, especially the predictability of it, was a serious weakness last year.
Our wide receivers need to stop dropping passes... This was mainly (not exclusively) a problem early on, so I find it likely that our receivers will improve.
As for tight ends, Fasano may not be a big deep threat (yet he gained significantly more yards per catch than "deep threat" Zach Miller), but unlike those deep threats, he's a solid blocker, which fits better in our scheme and, should we decide to actually open things up a bit, he'd be a constant threat to run a route instead of blocking (whereas Gates, Gonzales, or Clark aren't going to fool anyone).
I do agree with your assessment of our o-line, however. It often looked really bad last year and was certainly a contributing factor to our poor running game. A speedster like Reggie Bush could be just what the o-line ordered, though. Still, one area where the line was PATHETIC was horizontal blocks/moves. Anything straight on was usually solid, but when the o-line (or tight ends) was asked to move their asses sideways even just a step in order to block, everything went to hell.
To really get full use of Reggie, the line (and tight ends) need to be able to seal the edge. Part of that is coaching, though, and I certainly wasn't impressed with Dave DeGuglielmo (now entering his third season as OL coach) developing the line over the course of the season.