Lafazar: I think the list is amazingly small if you consider GOG has now roughly 200 (?) games available.
I'd bet the list of issues on Steam is far larger, percent-wise.
So far GOG has done a great job and fixed lots of the complaints, they really care and this shows.
Of course it could always be better, but from what I understand they are still a quite small team with limited resources, so they have to prioritize.
I think they are and should be concentrating on bringing out new games. A bigger selection increases the chances of someone finding a game to buy and brings exposure to the site.
STEAM is just terrible with its support. I'm not even going there. :-)
Either way, I don't like items on the list getting larger anyways. Overall, GoG has done great work.