Hi, I've been using MX Master 3 for about three weeks and here are my thoughts on it.

It would come in handy if you'd add "gesture button" actions not only for mouse movement but also for the mouse buttons (Left, Right, Middle, Scroll Mode) and scroll wheel as well.

Now it's rather difficult to press the gesture button though — the finger doesn't curl but goes sideways, which is unnatural. It would be much more convenient for this button not to be perpendicular but under the thumb aligned with the mouse like forward/back.

And consider second (different) gesture button on the right side for the pinky finger. This way it will be possible to add modifiers to forward and back buttons as well. With Gesture2 alone + Up / Down / Left / Right / LMB / RMB / MMB / Scroll Mode / Forward / Back buttons there will be 11 more actions, and even twice more than that if you'd allow Gesture1+Gesture2 modifier! Those are totally insane numbers. Also Gesture2 would allow to use modified side scroll. Mind = blown.

It would also be nice to have a side scroll with ratchet and discrete step rather than continuous one like it has right now: I just can't feel how much do I scroll.

But even now MX Master 3 is the best mouse I've ever had, so thank you for your work and keep it up!