I believe this is the opposite of what they are trying to do.

Make all dungeons do-able in 15 mins? Whats the point of a 90 minute timer then???

Speed Runs the way they exist with WP, and Brayflox are exact ways this game was designed poorly.... Dont get me wrong, I love Speed running Brayflox daily, and get excited when it pops as my roullette. BUT, these two dungeons were clearly designed poorly with not enough checkpoints to bottleneck the trash.

I would like to see MORE 40 minute plus dungeons. Maybe ones that are not so linear. Dungeons that may have more trash mechanics... such as:

trash mobs that ONLY target magic wielders (tanks wont be able to corral them as easily and the WHM/SCH would have to run to the tank for defense)
trash mobs that have HIGH magic resistance (flare will be ineffective, scathe killing..)
trash mobs that can actually tank against the party (kinda like the last 2 groups in halatali, but a lil harder)
Bosses that roam around in the dungeons and can aggro at any point (rather than the purple lock out zones)
Environmental traps (targets on the walls that Ranged dps will have to trigger to cause damage)
Secret treasure chests with Monster-in-box mechanics (ones that actually have a decent payout)
Puzzles/maze mechanics (think of like the security checks from FFVI)

And most importantly, bring back CURE as an offensive ability (cure vs "undead" mobs used to cause damage in other FF titles)