Enhancement Shaman is good, but it has a few distinct weaknesses. First and foremost, they don't really have a composition that they fit that well into. The current meta revolves around raid buffs, which Shaman has
Totem Furie-des-vents, but it isnt as popular (or strong) as other raid buff options. Enhance's tier is really strong. It buffs the AOE, funnel, and burst damage profiles of the Enhance Shaman and really makes their damage sneaky good. When coupled with
Soutien ancestral, the shortest kick in
Cisaille de vent,
Totem condensateur, and
Coup de tonnerre knockup, it's a C-Tier choice. If there was a better comp for Enhance it could easily be B-Tier, but without one it's hard to move up.
Enhancement’s big drawback is survivability.
Transfert astral is a very strong cooldown, but on fights that have one shot capabilities whenever Shift would be on CD, then Enhance is very vulnerable. You do have access to
Esprit du loup, but going Wolf before a big hit feels awful.
Débordant de vie is also good HP wise. Overall though, if you pull around an Enhancement Shaman's priority damage they can do some nasty things.