Please revert Gift of the San'layn changes

Gift of the San’layn allows you to cast Vampiric Strike. Vampiric Strike heals a percentage of your HP. That’s why I want to cast Vampiric Strike during Vampiric Blood when I have a lot of HP. I don’t want to use Vampiric Strike when I have Dancing Rune Weapon enabled, because it is a defensive cooldown during which I need significantly less healing anyway.

Why was this changed? I don’t understand. It was completely fine and logical before.