IMO, Rosen is better than Fitzpatrick (and Tannehill). He looks like he may throw more INTs, but he'll also make more big plays. HOWEVER, I'm upset with Grier and Flores for not rebuilding the entire o-line during the off-season (including replacing a weak Tunsil). Flores said that he wanted to be able to run the ball, but the o-line under both Philbin and Gase was terrible at run-blocking. (This was because Philbin and Gase preferred a short pass based offense where the short pass pretty much replaced the run.) When they traded for Rosen, the smart thing to do would have been to immediately rebuild the o-line with tougher, more physical players than what they had. Plus, how can you honestly evaluate a young QB if you can't run the ball or give him adequate protection? Building a physically dominating o-line and a powerful running game should have been the main goal for this season, and if Rosen proves not to be the guy, then the foundation will already be in place for the next QB.
I understand that the roster needed to be gutted, and that this season will most likely be a losing one. I'm okay with that. IMO, just replacing the previous coaching staff and their pathetic schemes and playcalling automatically makes them a better team, even with gutting the roster. BUT, there's no reason why they can't rebuild and still be fairly competitive at the same time; all they need is a competent o-line and a strong running game.