i doubt a patch released that far to the release date would allow them to integrate feedback from it into the game. in which case, what would be the point?
They've pretty much indicated they're done making major changes to the game. The patch would be another PR boon for Larian and an opportunity to continue momentum for the release.
That's all these PFHs are or else they could have released multiple classes at a time instead of trickling them out.
