Any advantage in game due to "late" retiring is not acceptable.
Since devs wanted people to retire "AT" lv31, and not stay high level. If you continued leveling, then, it was your choice, and there's no reason to give you "now" a little bone for it.
Also, it's funny how everyone always says "Just consider it, being level 33 and retiring is the same as retiring 4 times already !". This is complete bullshit. Yes, the total amount of experience needed is the same. But on one case, you spent 3/4th of the total time as an high level, easily destroying other peoples (providing the same skill), whereas in the other case, you "play" 4 long times as a peasant, all over and over again.
The only reasonable suggestion to "make" high level people retire, was adding this 4th heirloom level, wich doesn't give ANY advantage (or a very little +1 in speed OR +1 dmg OR +0,3 weight), compared to the +3, BUT, added a special honorific :
All hail Gnjus' Mighty Great Maul !
So... No.