WetGeek
I've gone ahead and made a bug report. Yeah it's very possible someone hasn't notice this yet, I looked for open bugs and it doesn't seem like anyone else has noticed it.
It's not the end of the world for desktop use. It seems to be a very minor amount of acceleration (I think it sets it to 2.0 by default? or maybe it was 4.0) but during games it gets quite frustrating.
Hopefully they can take a look into it and see if it's something simple. Seeing as every other OS using XFCE hasn't seemed to have this issue (for me), I'm expecting maybe they're just missing a config file somewhere.
Thanks for responding though! ๐