Horizontal scroll wheel is set to scroll horizontally - but guess what? It does change tabs (another option, I did not select it).
Also the reaction time to gestures is very slow, one to five seconds, but once it recognized a gesture, it reacts faster, until it falls asleep again. The same goes for the current stable release version of Logi Options (without the +). I guess it is an Intel problem, as the application is still not Universal yet. There is still time for Apple to change their minds and turn back to Intel of course.