The sensitivity of the gestures decreased. Now need to displace the mouse a lot for getting the gestures. Better with less sensitivity (as the non-beta Logitech options) or create a scroll bar for gesture sensitivity.
Also, there's no smooth horizontal scrolling anymore. Before (non-beta) scrolling was smooth with the scroll wheel and the thumb wheel. Now just smooth with the vertical (scroll wheel). Please make horizontal scrolling (thumb wheel) smooth again.