Making the team as successful is the goal. Its foolhardy to try to assemble a group of players to match a previous group.
The individual players themselves, no. But the overall scheme and philosophy is certainly attainable.
The 2007 offense plus the 2003 defense is the goal. But no team can ever assemble the perfect roster, and after you come as close as you can, you adapt what you do to what you have.
I agree. Keeping Moss does not mean you are any closer to having the 2007 offense. Moss is not the same player and the differences are only bound to become more clear as year after year passes.
I don't know if we were watching the same team last year, but that offense had a pretty damn similar roster to what it had in 2007.
So, like you said, it's time to adapt to what you have. What you have is an older Randy Moss and a group of WRs behind him who have generally the same style of play as a whole, which is a lot different than Moss. In a sense, those six guys - Welker, Edelman, Holt, Tate, Price, and Patten - are interchangeable parts in what you can do with them in your offense.
In my ideal scenario, I would have at least five of those six interchangeable parts on my roster. Like Charlie Weis wrote in the Pats' souting manual, I want a mentally tough receiver who can run good routes, catch the ball consistently, and isn't a *****. I would put Welker, Edelman, and Patten in that category; Holt, Tate, and Price, we'll have to see. If I can have three or four of those guys on the field at once, the defense will have to pay attention to each one. That will either open up the running game or cause one of those receivers to be open, which is the receiver that Brady will throw to. That is how the Patriots' offensive system worked under Weis - "the favorite/#1 receiver is the open receiver." Keeping Moss as a part of that group and giving him the playing time that such an elite player deserves cuts off the ability for the offense to do that. Brady realizes the ability of Moss above all others and is tempted to throw to him more than he should to maintain a balanced, unpredictable offense.
What I'm trying to say is that the Patriots' offensive system which has seen the most success (not only for the Patriots, but also teams like the Saints who employ 3-4 solid but not spectacular WRs and mix up formations) is one which does not have a #1 receiver. Moss by his nature is never anything but a #1 receiver. So while the statistics and talent of having a #1 receiver is tempting, I do not believe it is in the best interest of the football team as a whole.
One of the Patriots' best games last season was against the Falcons, a week after the debacle against the Jets and when BB took over playcalling from BOB (or so it appeared). Instead of lining up in Gun 0 Out Slot every play and have "throw to Moss" or "throw to Welker" their idea of "mixing it up," BB called a great, balanced offense against the Falcons. There was a ton of play action, some screens, lot of motions, less gun, a lot of Taylor runs (his best game of the year), and even a deep TE touchdown pass to Baker, catching the defense off guard.