Blizzard has posted in the Shaman feedback thread regarding upcoming changes to Enhancement Shaman on the Dragonflight Beta, including buffing Windfury Totem back up to 20% and reworking Crash Lightning.
Enhancement Shaman,Some minor changes coming in your next build:
Feral Lunge has moved to a spot below Windfury Weapon.
Windfury Totem is once again 20%.