The main problem is that Buff/Debuff create a reneweal expectation, setting player to be in Buff state and monsters in Debuff state constantly. Instead of making the Buff/Debuff
passive or aura-spread, the player is tasked with endless chore of refreshing the Buffs/Debuffs.
1.Passive skill: (de)buff always applies to anyone in range.
2.Aura:only one (de)buff is active by choice, affects anyone in range of aura.
3. Removing (de)buff and reworking it into active-use skill,on-hit charge/effect or item bonus(chance to cast).