Since Manuel only played 10 games last season, which was his rookie season, it's a bit early to decide whether he's good or bad or in-between. He had a decent game, at least as good as Tannehill, on Sunday. Tannehill, OTOH, has been a starter for two full seasons, and nobody confuses him with Andrew Luck or Russell Wilson.
I hate to rain on your parade, but one game is a pretty small sample size, especially when it's the first game of the season and your team is playing at home. Miami always gives NE trouble anyways. I remember the year that the Fins had like 1 win with an interim HC (Baker?) and NE came into Miami for a night game (MNF?) with 1 or 2 losses and a bead on the SB, and lost.
I understand completely. We Buffalo fans suffered through Dick Jauron's philosophy of offense-as-a-necessary-evil for four years before Chan Gailey came aboard. As you said, the question is will the game plans stay diverse.
This is also a big question for the Bills. Nobody really knows about Nathaniel Hackett's offense here in Buffalo except the coaches and players. Last year, it had to be "dumbed down" because we had a rookie QB and then subs. This year in preseason, the Bills kept their offense almost entirely under wraps, using only a handful of plays, so Sunday against Chicago was the first that anyone saw anything with any kind of sophistication. It was pretty good, but we don't know where the offense can or will go this season either.