Early access have one distinct flaw, it's hype killer. There is no big thrill in waiting for premiere, there is no mystery, cause tons of youtube playthroughs are already online. And thats apart from the fact, that AAA titles workflow and development are totally incompatible with Early Access idea. If it would, Acti and EA would already hijack this buisness model, cause they like their money (especially in advance). Thats why only two types of games go that route: smaller projects from relatively small dev team, multiplayer, non story driven mmo like games focused on mechanics. And all of them are from studios that need additional funding to complete the game.