It�s all about money, if you need the revenue from EA (uergh i will refrain from using that abbreviation again) to fix the game or implement promised/needed stuff essential to the good of the game I would say go for it.
But if not for that why not do the pre-purchase + alpha/beta thing.You get feedback ,people can clearly see it�s still in dev and you get revenue..
And for people saying RPG is not an appropriate game type for Early Access �> I kind of agree BUT you don�t need to play story..I have several hours in D:OS alpha just learning mechanics,gui,how the world works, skills and what have you not. So when it comes out I will be lord of the Divinity universe(shamelessly copied from my FB post
I am lazy like that
edit:
Only EA(shudder) game I ever played is SNOW because a decent
sportslike game from a developer not affiliated to E.A. should get all the support it can get:)
