Here's 2 takes

Take #1
Final Bosses in Dungeons should have a FPK (Full Party Kill) mechanic if the party does not fulfill mechanics properly

Example
When Hermes uses True Bravery and the Tank or Physical Ranged DPS doesn't Interject it, Game Over man

Why this take? People have gotten too lazy and Dungeons have become so braindead easy, you don't need to follow mechanics and just ignore it

Take #2
Normal Raids should go back to being actual raids like in Coils and Alexander, it will be an opening to a much better story building experience, I personally loved how you cause havoc while running through the city inside Alexander.

Normal Raids should be actual raids
Savage Raids can stay as Mini-Trials where it skips the trash mobs and puts you right in front of the boss.