In my opinion, Ritual of Retribution is an underrated PVP skill. Heal-over-times are extremely important for solo pvp/pve players and if we don't have passive healing on the front bar, we're always going to be stuck on our back bar. RoR was very good for helping me to be offensive in a dungeon and not be bar swapping to heal as much. With RoR, we already give up the ability to cleanse three more negative effects that the Extended Ritual morph offers. We shouldn't have to give up the heal too. Without the heal, Ritual of Retribution becomes a skill that one only uses if they have a healer accompanying them. So that eliminates it from most of the use it's getting now and it's going to become very niche. Bar space is limited and that makes a skill that is loaded much more valuable than a skill that only does less. Removing the heal from RoR will only make magplars that much more binary - meaning we can either be offensive or defensive but not both at once.
To those who believe RoR was never worth slotting in the first place, I say: yeah, It's true that you don't clear as many negative effects with RoR but there's never going to be a time when you don't have negative effects on you. Even if you cleanse 5 dots, they're going to immediately be reapplied. I would rather have a heal and damage morph than one that only heals and I'm going to have to recast anyway.