I have been playing on Galaxy for a few weeks now and I think it is great. I like the error rating system where you have to get a lower error rating than your opponent to increase your PR. The downside I have found to this system, is that if you have a blitz you usually get a higher error rating than your opponent. This is because you have made a far greater number of moves and your opponent has spent most of the game on the bar or playing forced moves and has not had an opportunity to make errors. I have won many games like this and my PR has not moved. I suppose it works both ways if you suffer a blitz.
I also won a tough single game match recently where my error rating was 1.05 and my opponent was 1.03 so no PR points were awarded.
Should there not be a threshold of say 2.0 or even 3.0 error rating points of difference before the error rating system kicks in and prevents you from being awarded PR points? This would help to address both of these issues.