Artki: That's neat.
Have you seen an english change log for the HD patch? (I think the one that comes with it is in Russian)
Is the balance patch well regarded?
There's no english changelog as far as I know, but if you use google translate on
this page, it lists all of the features and gives an explanation of what each does. I don't think anything major was added in this release, it seems to only be compatibility stuff. But it's still worth checking out that page so that you know which things to turn on/off to suit your needs.
As for the balance patch, I think it's well regarded. The maker knows what he's doing and took community feedback into account as well. And I'm no expert on balance or anything, but reading through the list of changes a lot of them make sense to me, especially the changes to secondary skills, spells and Conflux in general.
Perscienter: It's not without bugs. The auto-save between the campaign scenarios doesn't work with it, at least in my version.
The improvements to the user-interface are really good.
But GOG's version is 4.0, really? Ubisoft supplies 3.1 and some shady 3DO look-alike site 3.2. What's the difference?
Haven't noticed any bugs myself yet, but you might be right about the autosaves. I normally just turn them off anyway. I'm not sure about the version numbers, but I don't think there should be any differences other than the version number itself.