Dearest Square Enix, about this 15 minute timer...

[Arkine]

I'd rather see dungeons being expanded into 1-2 hour runs with a long cool down and a better drop system.

Cutter's Cry: infinite timer, 1 hour minimum to clear, 2 hours cool down, token system, more tokens for clearing extra rooms/bosses and so on. If done right everybody will have a sense of achievement and some endgame armor by the time more content is in game.

Beats the hell out of repeating the same 20min run 10 times a day and never being any closer to getting what you're after.