That's not really the question though is it. The question is whether or not Matt Moore is a better backup for Ryan Tannehill and in my opinion the answer to that question is no, he's not.
My reasoning is that Matt Moore is a different type of QB than Ryan Tannehill or Brock Osweiler. Matt Moore is a true drop back QB and nothing more. He's not much of a threat to scramble. He's not a threat at all to run the ball. I'm not even sure that rollouts are really something in his bag of tricks. Tannehill and Osweiler are both nimble enough to do all of those things. Moore also tends to get hurt easily or at least Gase believes that. The last thing we need if Tannehill goes down is Moore to come in just to get hurt himself. Moore also is not really a short passing game type of QB, he's more of a gunslinger in my opinion, he likes to go down the field. Tannehill and I believe Osweiler are more willing to dump it off to backs and opt for the shorter routes then try to push it down the field. I also feel like Gase feels the same way. Gase had the chance to play Moore last year and he instead begged Cutler to come play.
It's no secret that I never liked Moore as the backup for Miami, but apparently Gase didn't either and apparently he prefers Osweiler as well. Maybe I'm giving Gase too much credit, but I tend to think he might know a little more about Osweiler then most.
I don't disagree with your analysis of Moore, overall; but I'd rather have a QB that's gonna throw the ball down field. I'd like to hope we are going to have a much improved O-line once the draft is completed; so that whoever the QB is that he doesn't have to be constantly scrambling. As for Osweiler & Gase, as I mentioned in another thread coaches seem to look at players (and coaches) that they have been associated with on previous teams through rose colored glasses. The only time Osweiler has won is when he was on a team with a top rated defense. Osweiler is an interception machine. And yes I think you are giving Gase to much credit, the Cutler fiasco last year is a perfect example.