Grunker
RPG Codex Ghost
I actually prefer this instanced style of MMO. Especially seeing as most quests seem to take place in separate instances. Open-world MMOs rarely do anything other than 'kill x' and 'fetch y.' Neverwinter has those quests too, but there are enough other quests so it doesn't make the entire game tedious.
I like SWTOR's way of doing open world MMO with a few quests in instances. However, I will take open world MMO with few instances over non-open MMO any day.
Neverwinter doesn't feel massive, it feels like a collection of tiny Diablo 3 areas.