I think GW2 and BDO are much better poster boys for what MMO action combat can be.
ESO’s combat is… well, let’s say that outside of obvious lemons like Bless Online and Perfect World I think it’s the worst MMO combat I’ve ever tried. You need to animation cancel (and look like a glitchy mess on screen) to play well, it’s not very responsive for action combat and the skills aren’t satisfying to use.
Don’t get me wrong ESO is an awesome MMO and I wholly recommend it for lore nerds, role-players and Elder Scrolls fans, but it’s good despite its combat, not because of it.
But in general action combat MMOs tend to have pretty terrible combat. It’s not an ESO problem. They’re harder to do well than tab-target and they aren’t necessarily more fun.