While I can predict the complainers saying "why should SquareEnix waste resources on OLD CONTENT?", I'm still gonna say lets rework some of the old dungeons AND MORE IMPORTANTLY, the Raids.

Firstly, SquareEnix can reuse old maps and just give them new themes for both dungeons and Raids. Not being a programmer, I'm just assuming its easier to color swap, size change dungeon mobs and skins.

Secondly, giving a "refreshing" take on old content can be fun.

Thirdly, I'd like to take this opportunity to introduce a "Horde MOde" to these dungeons. Based on TIME, instead of running "Wall-to-Wall" 2 or 3 groups of mobs. Imagine removing all minor walls straight to mini-boss, but to "flood" the maps with mobs the longer you take. I would even include that during mini-boss fights.

Fourthly, Imagina the final boss fight, featuring its own horde mode with the mini-bosses joining the final boss (will limited hp/damage) as an "ADD" if your taking too long.

Both last points could be a "dps check/wipe" mechanic?