It's been verified by a few independent people that the files are actually the outdated ones, and Lar already admitted the "masters" of the digital version were actually just the original game on a mislabeled disk. The new version also removes most of the music from the game, a brand new bug that never even existed before. It doesn't really look like it's going to fixed anytime soon since Larian has a lot on their plate right now with two new games.
I don't really know how vociferous to be about it, since at a certain point it sounds like I'm just trash-talking or whining. But I feel bad for the GOG community who is buying the game just to basically get a damaged version.
The "poor old retail owners" who didn't get the patch are actually much better off.