They should just make all DPS greedy DPS with personal buffs and move the party Buffs to Healers to mitigate the boredom. Maybe some AST style spesific target buffs mixed in or basic boss Debuffs. Throw a few DPS skills or make it loop with proper mitigation and healing giving you big nukes and basic dpsing build big heal.

That would also allow for breaking down the 2 minute meta and make healers more proper supports and still have few buttons to do damage with during generic gameplay.