If you nerf a skill’s mechanic and decrease its usefullnes, okay it is a balance. But you decrease the overall game experience and overall fun or class fun. Instead just buff other skills or the other mechanic. It is also a balance and increase the overall fun in the game.
Giving a historical example: Mistform. You could have just given other invul skills able to use utilities rather than you remove utilities from mistform.
[VcY] Velocity – Gargamell