Bad

Blood visage hard to get - use gold or plat or a huge amount of time or luck to get just 1. Ratios are off. Perhaps another way to get it would be cool, like kill 1000 bosses in event or something ...

little variety and quantity of loot from bosses,

hauntlet overtaking energy farm meta too much.

Good

I love the elixir at plat tier and player tiers affecting which boss spawns.

,Idk why but it works and it's great idea, nice progressive system.

Chance for energy point from bosses - step in right direction for those who wanna farm planar arena for energy to mix it up and not get bored, though we can't see if we got full energy nor know if all bosses count

NPC dialog funny - I actually read it, and sometimes roleplay voices for videos

Op rewards for reaching silver, gold and plat - we can use multiple characters to get spectral chests, nice touch.