The main issue is lack of content and the demonsbane system. It feels meaningless to gear up. The dungeons are the same on every stage, there is no challenge and no real incentive to go for a higher stage. When everyone with story gear can clear the same dungeon and low stages drop all the same gear, why go up?
Option 1:
Bring in additional mechanics and real wipes on higher stages and put some of the meaningful loot on higher stages only (accessories).
Option 2:
Bring back easy, normal, hard mode for dungeons with hard dps checks and impactful mechanics and accessory drops on hard mode so people actually have a challenge and reason to gear up.
Also bring back Raids.
The game needs content progression, not this stupid everyone can enter every dungeon on day one stuff.