In this case the Early Access price is the same as what it will be at release (physical and digital).
Since Larian gave alpha access to all kickstarter backers and refunded anyone who specifically backed for alpha/beta, they didn't need to worry about the price vs kickstarter tiers. There is still all the usual whining on Steam, but at least reasonable people seem to slightly outnumber those who don't understand what early access is, or who have a zealous objection to it on principle (because apparently if people buy into early access, no game will ever actually be completed again).
That's good news, is this coming along well now? I also posted in a few threads at first (some people are really dumb, dammit. They should spend their money on books, not games.), but it's a waste of time anyway xD
And I don't have time to play the game, nor do I want to spoil myself. But it does seem there are enough people playing it, so I hope the bug squishing will progress quickly!
Also, I doubt the game will release on the 28th Feb. I think it's more reasonable to say it'll come out in summer or something.