Raith5
Adventurer
This is a personal preference thing. To you (and many others), the setting felt lacking in terms of specific detail, whereas to a lot of the setting’s fans it’s a key selling point. Personally, I prefer that From Software approach to lore, where everything is implied rather than directly stated, and there’s lots of room for speculation. It’s definitely not for everyone though.
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.