New update still doesn't fix the mouse issue. New browser is nice and all, but not much use if the product bought half a year ago is still a useless brick.
Sorry I haven't had time to dig deeper into this. I'm technically on holiday from this morning but I had a little time to do some tests and for me the mouse is always smooth, maybe not quite as smooth as the bare host OS but pretty smooth all the same. I tried both with my networked mouse (using my MKShare OS program and as yet unrelease arm64 linux client) and with a "real" USB mouse. The real mouse was a bit faster in terms of events / DPI and so the mouse travels further between rendered points but is smooth when you slow the mouse movement down.
The only issue I get is that a few very font intensive apps cause the mouse to freeze for short while while they open the fonts. This is a problem with it not being a true hardware sprite and the freetype font lib being quite CPU intensive
You mention 10fps but I know for fact that the mouse is read at 25fps or 50fps depending on context .
I don't know if you can capture some quality video of your problem?
Have you tried with a lower spec mouse?
I will out of the loop for 2 weeks after today but will try and have a look at anything you can provide.