The memory leak thing is annoying. I find if I leave the game running on the strategy map, go away for a bit and return an hour later or whenever, the game is unplayable and just quitting is a chore. Doesn't seem to occur the same way if I leave a battle unattended for ages though. Sometimes just a bit of reloading on the strategy map triggers degrading performance I find. Did no-one test the game for more than half an hour at a time before BI/the patch was released?