So if GOG gets a patch and just doesn't release it for a week, then nobody should have the patch? What if they take a month? What if Gamersgate or Amazon decide not to release patches at all, does that mean Larian can never update the game again?
GOG not releasing patches for updates that they have or being slow to release the patches they do release is GOG's issue. Their approach has advantages and disadvantages, but it is their approach, and can not and should not limit every other distributor or Larian.
There were publishers that never released the 1.49 patch for Beyond Divinity that removed the copy protection and allowed the disk version to be played in Vista and Win 7. Should Larian never have released that patch?