I do like to point out that the Act 1 can turn out to be a bit different as well.
On the official website the following can be found:
Quote
Early Access is a complete narrative adventure (Act 1) spanning over 20 hours of a single play-through, including a tutorial. It’s been designed to be very dense, played multiple times, and features 46,000 lines of dialogue, 600 characters to meet, 146 spells & actions, 80 combats and a large area to explore. A lot to get started with!
So they even planned to cram in a lot of stuff in a small space for us, to do game testing.
