Daboll's lack of success prior to the Bills is concerning. But in all fairness, his running game seemed successful wherever he went as an OC, up until this year in Buffalo. I'd be a bit uneasy about him, especially if Dorsey doesn't come along. Daboll's connections to Tua are a positive, but not guaranteed to bring success.
I think Dan Quinn would be a better choice at this point, because he brings his defensive expertise, which, as we all know, is Miami's strength at the moment. As a former HC, he just might understand how to manage both sides of the ball.
But with that being said, Quinn ultimately needs to bring in a staff that can get the best out of the offense and Tua, which is not guaranteed. Scary times in Miami for sure. Neither Daboll or Quinn are great choices, just that one may be the lesser of the two evils.