Fortuk: The DRM-free, off-line installers is why I shop here, so in that regard, no, it won't affect my purchasing games on GOG. The fact that they've been quick to respond to complaints and taken steps to rectify them, also speaks in their favour when you compare it to the stonewalling you receive at other on-line stores. The service they offer is also far superior to places like Steam and they're clearly putting in effort to fix problems such as patches not being uploaded by developers. All in all, no reason to reconsider shopping here.
The new front page design is cumbersome to use, however, and I hope they change it to be more in line with the sleeker, more informational style that they used previously. It's currently far too easy to overlook new releases and pertinent news items, which would affect my purchasing of games simply by me not knowing about games being available that I'd be interested in buying. Hopefully these are growing pains as the front page is currently not very pleasant to use.
Service far superior to Steam? That was a few years ago maybe.
You pay more for games. You get updates 1-3 months after Steam. You dont even have an option to set your store preferences to block unwanted games like Early Access (InDev), DLC or genres.
They also dont offer refunds for crappy games, while having a terrible curation team.
Lets see how quick they are to respond to the complaints on the new broken UI and 'rectify' tthe whole thing. I would bet 100$ that it wont happen.