I agree that having Brady or Charlie call the plays for the 2009 wouldn't help much.
1) When the first read is always 25 yards down the filed, line play will usually look bad. We've had much, much worse OL's in years when the offense done much better. I think health would help. I think offensive schemes that understood the skill set of the OL would also help.
The line has been worse against the run than the pass, and Brady has been under pressure even under short route, Faulk-first passes. Again, I've got issues with the play calling, and I think play calling has been costly at key points this season. I just think that if the personnel was doing its job, the play calling wouldn't matter.
2) Aiken is quite capable of playing both deep and in the 5-20 yard area. Steinback also seem able in limited circumstances. Certainly, Watson could fill this role.
Aiken is a #5 receiver, as is Steinback. Edelman is a #4. The team doesn't have a #3. Also, Aiken doesn't threaten the field anywhere. He's able to take advantage of the Welker/Moss threats on occasion, but that's the extent of his abilities.
3) I don't know the solution for #3. It certainly doesn't include having an OC who Brady has to train. Alternating first reads between Moss and Welker is not winning football.
It's a matter of QB coaching, not O.C. work. I don't know if O'Brien is failing or if Brady is just in a position where he still mentally feels that he needs the crutches of the bad habits. Having the first reads as clear as they've been this year has been a problem, but it's what happens when WR3 isn't up to the task.
4) I would add Watson and Baker to your list.
Baker could be helpful in goal line situations where jump balls and throwing to spots is what the Patriots are throwing, but he doesn't have the speed to break open the field and beat opposing defenders in read/react situations.
I'd agree with Watson, but I think the problem there has been more about the need to have him helping Vollmer at LT, and the O-line in general. He was being used as a receiver earlier in the year. I don't think it's a coincidence that the only 'big' receiving game he's had since Light went down was the Miami game that Porter stunk out the joint and the Patriots were able to use Vollmer without much help, anymore than I think it's coincidence that his receiving numbers even with Light in at LT have been down since the Jets game exposed problems with the O-line's pass protection.
Brady is just not the same against a heavy rush this year. In past years, the Patriots would see blitzes coming and send everyone out into patterns so that Brady could pick the opponent apart. This season, they don't have the confidence in Brady and the O-line to be able to do that.