Now, try to imagine the viewpoint of someone who knows neither 5E, nor Divinity: Original Sin. (I know, picturing what happens in other people's heads is hard.)
What do you think they think of the game? Do they think it's a mess?
My friend has played neither. Granted, he had me there to explain the rules to him. I've never play DOS, but I know 5e, and Baldurs Gate is enough like 5e that I could explain pretty much everything to him. He understands.