Hi,
I don't know why but the cursor glitches like crazy and it seems to be a raw input issue. When I check it with several multitouch tools, they all show that the input cuts off for about 200ms in every 3-4 seconds. I tried to fix it with Karabiner's multitouch extension but no luck. You can repeat the problem by dragging a file, with 2 of your fingers on the trackpad, for more than 3-4 seconds.