$5 million: more dragons and more areas with local bosses ,man I miss those strategic boss fights from BG2 ,like the elder brain
and the beholder cave in the underdark ,the prince and king in the underwater city ,and the dragons.
$5.5 more special items and loot ,and a shop like the adventurers mart in BG2 .imo NWN1 sucked in this aspect because the game
lacked great loot and you had nothing to buy with your money.In BG2 you worked hard just to get money for this great ring
and you immediately saw the fruits of your labor when your character rocked.
And the loot design was very creative : like the cloak that reflected low level spells back to the caster. You used it in the beholder cave and suddenly everything they threw at you went back to them and the dungeon was easy . Or the helmet that made you immume to mind spells made the mind flayer areas much more fun.