Health regen on kills better stay or it ruins this Class for pve. For pvp they could add a cool down maybe. Something like regen only every 10 seconds or something. Blade dancer has the same ability. Plus the option to have kills extend the length of arc blade. So honestly in my opinion it's fine. Hunters have been doing it since the beginning. Warlocks have been able to get an over shield without even getting a kill since the beginning. That allowed warlocks to be better tanks than titans, especially when paired with radiant skin. This is a delicate line. If they do to much it will ruin a whole subclass for both pvp and pve. I'd like to see numbers on what classes have been leading since ttk came out. If titans are not far and away the best, I'd say it doesn't need much if anything. If they are better but by only a little, that still just doesn't justify any changes since someone has to be 1st.