Larian should consider the Addon "Divinity infinite". This ultimate expansion pack adds persistent world functions, a dm client, lots of assets to the toolset as general improvements to the editor. Additionally this Addon adds a new parts of rivelon as ready world to play in and tell your stories. (there is not expected any deeper story, just the world to have a start and good example...)

What sounds like a personal daydream could be considered seriously. Heck, I bought actually all addons of NWN 1+2 more or less just for the assets, features and functions to play and build PWs and custom adventure mods for friends.

As I agree that 64 players. At least in one area certainly was to much for a turn based game, 16 could be a fine start. Just interested what major overhaul is needed to push the limits of the engine...

Could be aswell a way to outsource (I guess mostly assets) certain things to the community and hive some quality custom content developers the way to alienate their work...