[2019] Nerf damage, not playstyle

With the entangling roots changes in 0.7.5 we had two goals

1. To remove the melee aspect which was visually outdated, difficult to balance with the patches, and effectively being replaced by earthquake.
2. To refactor how the skill dealt damage to be more performant.

The stun being removed was a result of these rather than a specific decision to remove guaranteed stun from the Primalist. In order to reintroduce it new nodes are being added to the Earthquake tree that give it a guaranteed stun.