Not a new uniform, per se but a logo change would be welcome. Just a logo change (I prefer the logo from 1989 to 1996 with the larger dolphin going through the sun. My favorite Dolphins uniforms were the 1980's unis they wore through 1996 with the logo on the sleeve. I especially liked the aqua pants. An all-aqua look then would have been awesome, IMHO (All aqua is my favorite Dolphins look ever. The first time they wore those was against Chicago in 2002 on MNF. Ricky ran wild). I hate the all-white look. I think the aqua pants in any of our uniform looks is superior (except the throwbacks--because they didn't have aqua pants until 1989).
The orange jerseys in the early 2000's were teh worst. I'm just glad they didn't pair those with aqua pants (though I did that on Madden once just to see how hideous it would look). The Minute Maid jerseys we wore for a color rush game a couple years back were the biggest abomination to hit Miami since Nick Saban (to kinda, sorta paraphrase Jim Mandich's comments about Mr. Saban on the NFL Network's Top 10 Coaches Who Belonged in College.
They won't go back to the old unis full time because of money. It's similar to why the NBA brought back All-Star jerseys after scrapping them for a few years in the late 1990's (players wore their team uniforms in All-Star games for a few years). With the retro/alternate uniform, you have another revenue stream. Now fans will buy a home jersey, an away jersey, a retro jersey, an alternate jersey, etc.