Not all the great players make decent coaches. Having the talent, speed and instincts to play at a high level doesn't necessarily translate well to teaching others with perhaps lesser talent, speed and instincts.
I would also like to see one of the old Dolphin greats emerge as a coach, but they have to show an inclination that they really want to do it, put their hand up and want to get involved. Jason Taylor could be good, because he is smart as hell. Zach Thomas is a bona fide legend (he got the biggest ovation at the 50th anniversary celebration on the field, yes bigger than Marino), but to date he hasn't shown any desire to get involved in the coaching. Sam is involved with the team through the Finsiders, but he comes across as more of a comedian than a prospective coach. We simply need the best coaches for the future.