Regarding dungeon gear:
1) a token/coin system for all dungeons just like the tokens for ex primals. One unique token is enough. Dont need several for each dungeon out there.
or
2) make dungeon gear tradeable again. Just like some of the gear from Sastasha, Halatali and Dzemael. (No spaghetti code excuses here)
I think the MB would also benefit from it, like allowing people to spend theire gil on something good again( not just for minions and mounts)

Regarding housing:
Upgrades for Fc rooms and apartments like more space or even a second floor.