The engine is an improved version of the first game, right?
If they could add two more players into it and it was also "limited by engine", and they did it. This is a really hugely demanded feature, it's what GM mode lacks to make the sales skyrocket. DnD patches are being made, when we have the exporter for models and stuff peole will create new models. This could replace very easily roll20 as a platform for dnd roleplay. That means HUGE money. Larian wouldn't even need another kickstarter for a 3rd part of the game if they help to do that, just saying.