The 3.50 release includes the Chapter 1 fully remastered, ofc it's possible till the final version 4.0 that there will be some more changes, Chapter 2 is already in work and should get some previews these days, I'm kinda happy with how some renders turned out, thus the reason why Chapter 1 will probably get some more scenes or extended by the time the whole remaster is done.
Once the 4.00 version is released, then I could fully recommend doing a new play through, till then, it's only for tests and see what's changing, based on how the game build is named INTERNAL.