I don't think Early Access will really increase sells. I'm already going to blindly pick up the game after hearing that you have the original Banjo Kazooie team and Ex-Rare employees that are guaranteed to give this game a absolutely stellar and amazing soundtrack. This team is by far one of the most creative and innovative and I don't think we need an early access. Yes it sounds great, but I think the surprise will be worth it. I fail at keeping myself away from leaks because I'm on the internet all the time and such. I don't think Playtonic is going to change their mind in terms of early access, but I do think they can put an effective measure to not really spoil any major final parts of the game. After all we are the consumers. We're not beta testers willing to risk the surprise and fun just to test out some stuff. Imagine the developers. Getting to make the game and hear people talk about funny and surprising stuff, while they themselves get to miss out completely on the experience.
Great in theory, but disappointing in the long run.