Let's be direct. You hamstered the Paladin tank.
The biggest difference between the Justicar and the other two tank loadouts (Sentinel/Vanguard) is that you can heal at the cost of being undeniably less tankiness. In theory I heal what I have less in tankiness. The Problem started with TIC. If I cannot bear enough, then self-healing is of no use to me, because I'm dead. But now you've taken the cake.
The Justicar loadout remains unchanged(!)
That being said. You have 500 heal magnitude Encounter at costs of 220 divinity without any shields and of course without crit-stacking like a real healer. The special Power gives you 200 heal magnitude, if you block. The special Power is not able to critically hit.
The new At-Will of Oathkeeper gives 500 heal magnitude at costs of 30 divinity with crit-stacking and optimized stats like a real healer. The heal is faster, a lot cheaper and higher than the 500 heal magnitude Encounter at costs of 220 divinity from the Justicar. The special Power not even worth mentioning in comparison. Not even considering that the tank has no possibility to regenerate like the oathkeeper divinity. In my tests the oathkeeper was the better tank only with the use of at-will. Is this a bad joke?
The Encounter now heals for 1000, with shield and optimized values. Now you don't have to be an Einstein in order to recognize that the self-healing of the Justicar no longer has any significance. Vanguard or Sentinel is now META. With the increased healing of healers, it no longer makes sense to take the weaker Paladin Tank with you.
If this goes live without making any changes to the Paladin tank, then I guess this is goodbye. I have no interest in playing a healer.
I ask for swift clarification. As it looks now, I see no sense to invest more time in a project that is dead for me. Thank you.