Hoping for some of these.
Bring Set items 4/4, 5/5.
Remove temper limits.
Add new temper options.
Allow GA enchanting.
Mythic dagger or bow/cross bow.
Useful mythic staff.
Rework melted heart or add mythic offensive amulet.
Add ignore durability to all mythic armor pieces.
Add in some party combos…
i.e Necro add minions to other party members.
Rogue add crit damage and movement speed.
Barb increase overpower strikes or shouts increase effectiveness per party member affected.
Sorc can add elemental multipliers to attacks or mirror defensive spells to party members.
Druid spawns storms on party members too.