The problem is that the bubble is up all the time, it has minimal CD even after the duel has ended the new one becomes ready and same shit all over again, whereas DH has the biggest DMG spell which is meta and has a 4 min CD or 2 min depends on your choice. Just dueled another pally, used netherwalk and shadowmeld to delay the bubble, but it still does not help where you as a DH has shitty healing abilities comparing to a paladin, where he does heal 50% of hp + high damage. You can't compete with that. I am 200 ilvl versa 24% and don't tell me 'git gud', because I am rated above 1800 in any bracket.
The numbers don't lie. Paladins tank has higher healing than the healers? I mean wtf I saw in many arena scoreboards and there are issues. As I said number of times. I don't mind the damage, but I mind the self healing. They heal like they were in a healing spec.
"Oh, tanks need selfhealing, because sometimes it can mean you could avoid a raid wipe" Cool, thats fine. But reduce the healing in PVP situations.