If having newer games means having more release days, then I'm all for it. Because of the nature of GOG's, the current model has them releasing games twice a week while competitors release them in far more frequent fashion. If newer games means we'll have a newer game released on monday and oldies on Wednesdays and fridays or something, then it's win-win. If it means they'll still release them twice a week, then the older games will suffer.
I take it releasing newer games is far easier than older ones since they don't have to track down unknown rights owners from no longer existing companies and fix the games to work on newer systems, which must take a lot of their time.
Every day release would be a wonderful reason to visit GOG.com from mon to sun :)