@ OP

If warriors didn't have +25% MaxHP their +20% healing would be ineffective. Cause they will take more damage and without the increased threshold fail to realize it's POST DMG mitigation. The coming changes makes Warrior stronger by that extra 5% Max HP only, because +20% MaxHP and +20% Healing = +20% Damage Reduction.

IF directly applied to Paladin, how would you like a -20% DMG received but also get a -20% Max HP? Defeats the purpose doesn't it? While it might be passable for small hits but the big hits are still going to bring you down.