I'd love a NWN2 remaster. It's been one of my favourite games since I first played it in 2007/08. Not being a modder, I'd love to see the OC reworked - some of the the planned cut content reinserted, Act 3 given more love, perhaps some extra missions and side quests.
I know it won't happen. :( The original voice actors couldn't be brought back for the two expansions for contractual reasons, so it seems as if there's no chance of it happening ten years down the line. Plus, I think the kind of improvements I like are the ones that are most expensive to implement.