The thing that stands out about Nentir Vale is it's one of the few D&D settings that is boots-on-the-ground scale. 200 miles by 150 miles should easily cover all of the adventuring locales for a party to reach at least 10th level. It's a setting at a scale that is meant to run actual adventures in, rather than a setting for DMs to spin fantasies or for writers to set novels in. That practical, accessible scope is sadly rare in D&D.