I've been playing BG3 since I was first able to find a torrent, using the fitgirl repack, and I think I'm going to buy this one. To play online of course, but also to support the devs for making a damn decent game.
Would really like not to lose my progress - think it'll transfer without any problems?
Probably. As far as I'm aware, cracks usually just alter the executable to prevent DRM and online checks. If you're buying a copy on Steam, you can even copy the pirated files over to your Steam directory and do a verify files, and it should update without downloading the entire game again.