You can 'faceroll' mobs in GW2 just as easily as you can in WoW, but in both games alike, if you pull multiples, elites/veterans or step into a dungeon to then stand still and press skill buttons, you will die. A lot. Yet people are speaking of GW2's combat as if kiting, backstabbing and mouse-turning never existed. I'd actually be inclined to argue that WoW's 'dungeon dancing' is leagues ahead with regard to demanding an awareness of your surroundings, positioning, your team's actions and generally having to move your arse quickly to somewhere else on-cue, whilst maintaining as optimal a damage/healing output or threat control as possible. Granted a well-geared, skilled tank can make the life of a DPSer considerably easier on various dungeon trash, but still, one needs more than luck and an aggro-magnet doing the likes of Bloodlord Mandokir without watching closely for tells and moving very quickly when necessary.
In contrast, I've had groups run every GW2 story-dungeon up to level 60 by pretty much holding down strafe and letting autoattack spam itself, dropping a dodge, or utility skill now and then to stay alive and this, to me at least, is why after 2 weeks of solid play to 75, I've sadly become instantly bored of the world, my character and the game in general. I'm glad they tried to remove the trinity system, but it feels hamfisted, because instead of skill-based mob control and group role mechanics, we're left with randomly meandering, uncontrollable mobs being blind/condition spammed to death as everyone runs in circles around the room trying not to get one-shotted. That and it seems there's literally nothing to do at 80 bar the impersonal 'follow the rabble' of WvWvW, or the completely detached PvP instances.
I really wanted to love it. And for a while I did, but in the blink of a eye of a dragon 'boss' that 2 people on mortars can take down by pressing one button for 20 minutes, the sheen wore right off.