I've posted this in years past, but not lately.
Rather than retire numbers, how about having to earn certain ones? 2 (David Palmer and Derrick Henry), 6 (Smitty), 9 (Young) 12 (a ton of QBs), 22 (Musso and Ingram), 54 (Lee Roy and several others), 73 (John Hannah), 75 (Barrett Jones), 82 (Ozzie Newsome and several others).
Coaches and the players' leadership council determine who wears them, and it's a one-year deal. As in, just because you earned it last year doesn't mean you get it this year. And not every number has to be awarded every year. If there are no players who met the standard set by the most prominent previous wearer(s), well, nobody gets that number that year.
And yes, I'm sure I've left out some earnable numbers. There are so many deserving players in our history, you might end up having to earn all of them. Alabama problems.