Unless there are some other upcoming changes that will make it impossible to still have damage while stacking health and utilizing these absurdly overpowered heals, they need a big ole nerf. And frankly, as someone that doesn't like "troll" builds that do nothing but stand around being unkillable, I'm 100% fine with them being nerfed regardless. With the current state of the game, fighting against a Werewolf or Warden basically feels like fighting some other class that has an invisible, untargetable healer following them around, who never messes up and gets out of LOS or range.
I finished a BG this morning where one team was a premade of 3 Werewolves, and each of the other teams had a dedicated healer. Each of these healers had in excess of 1m healing, and the one on my team was actually quite a bit higher than that. My team's other players also added up to a total of 671.3k cross healing, with an obviously unknown amount of self heals mixed in. Still, the 3 WW had fewer deaths than any other combined team, at a grand total of 5 (the squishier of them died 3 times, while the others were at 1 death each). A Magicka Necromancer on their team, who was also premading with them, died 8 times because he didn't have access to ridiculously overpowered self healing.
Lest anyone think that the Werewolves only survived because our damage output was bad, the scoreboard damage numbers were as follows: I had 1m (not counting Blastbones, as it doesn't show on the scoreboard), and that was with a lot of disengaging to grab flags in Crazy King. My other non-healer teammates were at 1.7m and 1.5m. The third team had one player at 1.8m, one player at just under 1m, and a Mag DK that hit 3.7m, which is the highest I've seen in a long time, and perhaps ever.
The ability of certain builds to heal to full in 1-3 GCDs while briefly holding block, dodging, or sprinting around LOS is just ludicrous, and it's past time that something be done about it. It drains every ounce of fun out of the game to fight builds like that. As a point of comparison, my Resistant Flesh on a Magicka Necromancer costs just over 4.1k magicka as a Breton, and typically heals for slightly more than 3k health on a non-crit if I'm not defiled (the number is that low thanks to wearing proc sets, which is the only way for Magicka Necromancer to have any meaningful offense whatsoever). That's < 1hp per point of magicka spent for non-crit heals, and my crits only go a little over 5k.