timppu: Too vague, I can't vote for that.
For instance, I am fine if the GOG version doesn't have support for achievements or trading cards or in many cases even multiplayer, I am fine having only the single-player part of the game, as long as it is the true meat of the game. It would be shame if all such games were removed from GOG.
I am unsure what to think of Armello, as I am not fully sure what the missing DLC is about (and why it can't be released DRM-free). If it is really gaming content that requires online connection and authentication to play... then I would have been pissed off even if I had bought the Steam version, thinking its single-player part is DRM-free.
It's more like purchasing and trading items like cards for spells, books and stuff that can be earned during turns and/or purchased/sold through Steam Marketplace. LoG wants to further monetize it through digital cruft that we'd all be selling for anywhere from $0.03 to $3.00, with VALVe and LoG taking their cuts. Steam trading cards would also be available (shudder). After having my Steam Inventory cluttered with all kinds of digital junk from Team Fortress 2 and CS:GO that Steam won't allow me to simply give away (the lowest that you can sell an item from your inventory is $0.03), I considered myself done with that mess.
Five years ago I was one of "THEM" and was all for developers who expanded thier titles to incorporate as much Steamworks-related things as possible, but not to this extent. Back then I was absorbed by Steam and VALVE with no thought as to others who were on the "outside looking in" regarding alternative means of gaming. Though my account says I joined in 2015 (I had an old 2011 account that I forgot, so I made a new one) I feel bad for the entire GOG community, purchasers of the game or those who simply wish to not be tied down by DRM of any and all forms.
I had never witnessed an instance in which a developer just flat-out says to the effect of "VALVe is allowing us to monetize our game in ways that CDPR can't ever hope to achieve, so here's the 'best that we can do for Galaxy's limitations' version. Don't look for much in the way of further updates because it's not economically feasible to support two versions - one constantly evolving for those who'll deal with the DRM for the sake of a better experience [and who'll pay us more and more money] and one for the rest of you".
And SERIOUSLY, why in the WORLD would any human being in their right minds retitle the game to PUBLICALLY SHOW that the release is in effect an inferior version? It's a slap in the face to some, and a sucker's game to pull in unknowing players who'll spend thier money on what will be a lesser version. If it's too bothersome to support the GOG version due to Galaxy's limitations, then do the classier thing and announce a removal after one final sale, explaining why both versions can't maintain parity.
Don't dangle a fish line with toxic peices of bait simply because the pond you're fishing in is smaller and has lesser scenery than the large lake with a mountain view right behind you. You'll poison the pond killing the fish simply so that you'll begin tainting the lake.