My preferences are for about a further 20% detail

I like 4e and POL (despite not playing in Nentir vale - we played in POL version of Mystara). But I have two slight issues with POL and Nentir vale as written. One is a question of realism - where do the people in Fallcrest get their food and survive if kobold colonies are 10 miles away? Another is the the stakes in POL - I think the 'lights' have to really shine and be worth the PCs frighting for. I am not sure they do in Nentir vale setting. Would anybody miss Fallcrest if it fell?
So yeah I think a good campaign in a POL mind set is great - but I think Mearls takes pushes it away from what I prefer form POL setting.