Can't say I am surprised. But also I do find it odd that people would expect anything better. Because it's really not even possible in Guild Wars 2-- all open world stuff has to be this simplistic/mindless.
I remember a long time ago, when a plucky young Fencers started to read the MMO Champ subforums. Back then there was a massive thread which asked the question of "endgame" and "raiding" in the open world. Specifically framing the question in relation to the potential these massive DEs offered a "new" type of raiding or replacement.
My response was in so many words; "DEs can never service raiders or hardcore PVE enthusiasts because by their nature DEs/open world bosses must be inclusive. And exclusivity is the actual design hook of raiding."
To which Odeezee, Mif and others proceeded to yell at me for 20 or so pages. Despite being thoroughly and totally incorrect in every one of their posts. A few months later, "OMG LEVEL 15 RAID BOSS SHADOW BEHEMOTH EPIC VIDZ" surfaced. I lol'd.
I don't begrudge Anet for these events. Though folks should have really tempered expectations based on what I am reading around the web. Exactly as I suggested over a year ago.
Feels good, this feel. I relish it.