Yeah, a bulk of the features present in the prior year's build are absent.
Combat mode with the Q button is gone, instead you must equip the spear to enter combat mode.
Likewise the inventory is gone too. No more cucumber :b
A mass of the sexy time animations automatically switch between A / V, perhaps this will be addressed in the refined build.
Assuming first person is on hold.
Camera control has seen better days, middle mouse is usually for pivoting, instead we get a reset. Could take some getting used to.
Character clothing got nerfed.
Prone is bugged, if you get stuck with a slow walk, don't forget to press space.
Fly is completely absent, tried enough characters to lose interest.
Swimming was supposed to be implemented, guess not.
No more pose selector with the numpad.
You cannot select resolution size anymore, guess it's automatic, I had no issues.
They did add a foliage slider which saves my GPU from catching fire.
Among a bunch of other neat stuff, this is a fairly solid build, and more than anything I'm just glad they're doing something.