I've been really, really crossing my fingers for this and would love a link to an official dev response, also. I've been keeping my eyes out for this and didn't see anything.

Ideally, it'd be an optional cap, that gets you more seals or crazy loot or whatever, but I think this is important for keeping content that's -not- at the game's level cap interesting and relevant. (Which given Yoshida's commentary lately about XIV being geared towards being played at the level cap, and that being the reason for speeding up XP so much, may not be as much of a priority? Still, I think it'd be a wonderful feature.)