-Polling clipping seems to be fixed. 500-1000 hz also seem better than 125-250hz from the 5 mins of observation.
-Max speeds seem to be similar to a normal configured A3X6X+ mouse. 800 DPI capable of tracking well into 3.3-3.6m/s (Edit: 4.15 m/s @ 127 counter) on my Goliathus Speed via 1000hz. (a native 400 step would likely provide even better results) 1600 CPI around 2.3ms on same surface.
-Lift off is higher as stated, but it's not really a con or so to say. I would also like lower lift off distance, but understand the complications involved with current gen optical sensors and lens.
-I understand that we all have preferences, but I think whoever is creating the firmware should focus on cursor quality, speed (IPS), and stability of the mouse as a whole. Messing with parameters that lower lift off just create a double edged sword effect.. Of course a lower lift off firmware would still be nice, but it shouldn't be the main focus as it can be self fixed via proper tape fix.
A lot of people won't understand my statement, but I'm sure its clear to those that do.
Edit: For a "beta" firmware, it's pretty good. Couple driver issues though.