Removing Fel Rush from the core rotation of Momentum (Now Exergy) entirely undermines the engaging playstyle that Momentum alone provides. Exergy is a poor, unfun replacement, that neither incentivizes nor encourages the same fun and thrilling gameplay, that Momentum has offered since the inception of the class.
Momentum is a stable of the fast-paced action of a Demon Hunter, and the Dragonflight / War Within Season 1 iteration perfectly captured this by allowing us to weave in our movement abilities seamlessly to keep momentum in the flow of combat.
The infamous and inept “no mover crowd” will not be satisfied, until Havoc has no shed of movement left for their damage output. An element which is wholly unique, and cherished by a lot who play the class. People will always be unhappy by talents such as Momentum, Inertia and even Exergy to come.
We have a Talent Tree to provide meaningful choices of player expression. The removal of Momentum from this equation is a net loss, as Exergy does not even come close to providing the extraordinary gameplay that Momentum did.
It is a passive, nothing-thing that is dull, boring and doesn’t play into the quick slash-and-dash playstyle that Demon Hunter portrays. Momentum -does- that.
Returning Momentum to Havoc is quintessential for such gameplay. Felblade can even be added to the rotation between Fel Rush, Vengeful Retreat and the Hunt to furthermore incentivize an active and swift pace during combat.