You misunderstand what early access means. It does not mean 'full release, but early'... because then what's the point? Why not just release the full game? The point of early access is to test a game during its development and get feedback from the userbase. Xbox will get an exclusive first look at Definitive Edition which is a hugely revamped version of divinity 2, which PC players who have owned the game for a year+ will not get to experience yet. Don't consider early access a release date. It's not. They could just as well not do early access at all and say 'coming august 2018'. Would you be upset then?
