Equipment diversity is a big element of these types of games and if I was Larian I would be adding some whether it was apart of 5e or not. Clearly room has been left to essentially makes your own variants and they should do so. Decreasing equipment diversity would be a poor choice. The pathfinder pc game(s) have fantastic variety and has a much better feel. Aside from general item diversity BG3 feels empty of equipment in general which takes away from exploration incentive. I dont want to fight through a dungeon only to come with a basic longsword and dagger and some plates and cups...
