At this point I think it totally redundant. That would make a spec a great favor by basically deleting downtime and help with st as well. Demon hunter just zip pressing things on cd and fury is a pseudo resource because how abundant it is for them.
We’re fine with energy as resource i think
This class only need a minor ST buff (from WW pov).
I would be glad if they bring back the Tiger Strikes (8% chance on each attack to proc a 50% attack speed buff, and 4 extra attacks ) from Mists of Pandaria in the next xpack.