I've tried this for two days and it only heals me, not other players. Before we had the trails of light to see who we were healing. I thought maybe those had been taken away but several players have almost died because when I used regeneration, it did not heal them. It wasn't that I was in a large group, there were three of us. I get healed but no one else. I unloaded the skill and put it back but it's still bugged for me. I did submit an in game /bug report.