Basically two things need to happen, and Miami, will be as good as anyone here can hope for...
1. Get a new, but much better, more experienced D-Coordinator. Some here will be adamant, that Miami has no talent on defense, but truth be known, there is good to a few possibly great players, but if your DC is not going to put the defense in positions to succeed, it will not work. The Defense becomes more consistent, a great deal of Miami's problems, are automatically fixed.
2. The O-line needs to once and for all get fixed. Those that have had an open mind, and have been paying attention, have seen when Miami's O-line is solid (not great, just at the very least solid), Miami with Tannehill with the starters is able to move the ball. Obviously the better the line plays, the easier the offense moves the ball.
Also, injuries are part of the game, and if those two things are fixed, injuries should not hurt Maimi to much if at all, but season over Injuries, and mass injuries at once need to also stop already...Miami has to be top 5 in terms of losing players for the season in the past 10 years...get a better trainer, fix the field to not be so dangerous. But figure It out.