I think it's even simpler than that.
Brady has to see if he can, as he put it, "evolve" in just one week back to the QB whose primary target every passing play was "Whoever the **** is open." He won three SB's that way. The configuration of one big time WR (Moss is a big upgrade in that regard, BTW!!!) and several solid but no dominating targets worked very well for him. Look at the final drive in SB XXXVI: three completions to a running back, one to a tight end and one to a WR, the names of which (Redmond, Wiggins and Brown) are mainly known only to Patriots fans--ok, Chargers fans will never forget Troy Brown
. In the famous Snow Bowl game (ok, "infamous" in Oakland), Brady completed 32 passes to six different receivers, none for more than 10 receptions and none for less than three.
Once he got Welker and Moss, he changed his approach, as would any sane QB who understood the weapons now at his disposal and it worked historically well in 2007.
Also, I think our running game will surprise you; Taylor's hungry and has September legs; Maroney has become a productive back with a chip on his shoulder and a lot to prove (including, unfortunately, that he can hold onto the ball in the redzone); Faulk is good for four or five important gains; Morris is solid and the Law Firm can deliver. I think you'll see a lot of wrinkles with one or more of them catching screens or short passes in the flat.
The big question mark, and rightly so, is the D, especially late in the game. Even though the circumstances last week were a little skewed, it once again proved that it can't hold a two TD lead in the fourth quarter, so you'll know you're never out of the game until the clock says so, unfortunately.