I personally don't mind the idea of adding a few areas to grind in. If the "Experience Point Economy" is a concern, then those areas can provide minimal or no XP. My main concern is having areas where you can continue to get loot drops - especially crafting ingredients. I just find it rather odd that a lot of supposedly common crafting ingredients are both finite, and in actuality far rarer than things like weapons and armor.
Of course, recently there's been a lot of chatter about how Larian hasn't implemented the Mega Dungeon yet. Perhaps when that's added, it will provide some kind of renewable encounters or something.
