My 2 cents on the Advent side story. 
- 2021.07.15 17:21 (UTC+0)
On a personal scale i like the concept.
Having a 3 part fight that has different mechanics per phase makes for content that is fresh and new. The over all mechanics of the fight are good with needing to make multiple team comps per phase to get it to work. The coding side is smooth as butter when going through transitions of phases.
The only issue is that right now its over tuned. With a a mere fraction of players being able to get through hard and i haven't heard of anyone able to get through epic hell means that its inaccessible for a large portion of the player base. Hopefully the Dev see and tune the fight to still be a challenge but not an insurmountable fight that just ends in unrewarding frustration.