I am starting this thread even though there are other threads discussing this because I want to put in a fresh new idea with a Dev tag.
Here is something I thought about that could satisfy both the people who wants a level cap on dungeon so that the content remain challenging even when going in at higher level and people who wants uncapped dungeon so that people can play the way they want and waltz through lower content if they so wish.
While both have their good points and bad points, I do see that giving more freedom to people is usually a better design. Therefore here is what I think would satisfy the best of both worlds:
Giving the options to cap or not the dungeon.
Capping the dungeon will make all players over the cap be at the cap level (so i.e. if the cap is 30 and a level 50 goes in a capped run, he will be level 30 for the run). by doing so, the boss/bosses have a chance to drop novelty items like special/silly gears, mounts (if they put in more than chocobos, or special chocobos) or maybe even special materia and HQ+3 version of the gears that would drop in uncapped runs (similar to heroic dungeons in WoW BUT with the advantage of have great replay value even when the max level is raised). Even just an achievement for doing so would be better than nothing at this point but it might be just too weak a reward to have players do it and also nullifies the replay value it might gain from cap option.
What do you guys think? Please don't flame, you are entitled to your opinion but just state your opinion and say the why(s) of it while remaining respectful of other's opinions.
Edit: While I know that the current dungeons won't have a cap options since it was confirmed on a french thread that they are uncapped. Please keep in mind that this is a suggestion to improve the game's replay value and longevity for both existing and upcoming players. There is nothing preventing them from implementing something like this in furture updates.