The first question I would have: Is Moss still as physically capable as he was even early in the 2010 season (much less as physically capable as 2007, which I strongly doubt)?
Second question: Would BB/O'Brien/Brady be willing to make a significant commitment to practicing the deep/outside routes that Moss MAY (or may not) still be capable of bringing to the table?
I mean, I understand that most folks think, based on their success in 2007, that the Brady-Moss connection is "special" and that there's some sort of "magic" to it. There ain't. As superior as they both are as players, they didn't develop their 2007 elite-level consistency on deep connections without practice - a cubic buttload of practicing ... just ... that.
Both are four years older now and Brady apparently has been having issues with his throwing elbow. He might even be on a pitch-count in practice, for all we know. Deep throws would likely put more strain on that than most others and practicing them would necessarily take reps away from practicing other things.
Perhaps BB will come to feel that a renewed Brady-Moss connection would be decent often enough, even without extensive practice, to make some positive difference. OTOH, the results could be similar to the first four games of last season - or worse.
In their past, both Branch and Ocho had made those tippy-toe, falling out of bounds sideline catches something of a specialty. Both have made at least one of those this season and Brady has missed both of them on those throws at least once apiece. Maybe it would be just as productive for Brady to practice THOSE throws a lot more with the guys he already has.