I think our passing offense is similar to our defense, in a way. You maintain discipline, resist what your "instincts" tell you.
Say you've got four receivers on a play. They aren't running four separate routes, it's one big play designed to make the defense make a decision, be it the safeties, corners or linebackers.
Everyone needs to read the defense in their area and change the route, if necessary according to what they've practiced and studied, not to get open. If everyone makes the right decision, the defense will be breached ans someone will be open in the right place at the right time.
Why would people struggle? Say a receiver from a less strict system comes to the decision point and sees he'll be open. Unfortunately, Brady is looking at a different receiver, who isn't open (maybe due to Rec #1's decision, then comes back to receiver #1 as the defense is now adjusting to what the did, he's not where he's supposed to be, he's no longer open.
This offense absolutely favors jitterbugs like Welker, Troy and young Branch (old Branch is still good). Long striding receivers definitely have an effect on defenses with the long ball, but that's a different type of offense. Doesn't mean we can't get speedier receivers, but they need to be able to make quick cuts and decisions too.
On offense and defense I think Pats players need to color in the lines for years before they start being more creative. If you can't be where you're supposed to be when you're supposed to be (for that defense) or maintain your discipline (on defense) you need to go, no matter what else you can do. That's why I always had mixed feelings about Moss, as great as he was, cause i think it set back our system so we could emphasize a different type of passing game.
Watch our passing game when it's clicking. It almpst does seem like their isn't any defense, its playing catch, and that's never the case in reality.
Ryan put up a good game plan last year and we have some personnel weaknesses, but any offense can be stopped with the right game plan by a good defense for one game. It's real hard to stop ours compared to most.