I gave trying to do the majority of my navigation with hand tracking a shot on the recent beta. Seems that the dead-zone is way too small between pinching to activate, and any movement happening. I often pinch, and start immediately walking in some random direction I didn't intend since there's like a 2mm dead-zone. I'm sure this can be gotten use to, but my reaction to it has been "this is way too sensitive" so far.
In addition, the ability to increase the distance between activation, and full speed would be nice. I'd more prefer to use my arm to navigate than my wrist. More like I was playing with an Atari joystick. IE, I think if there was a solid 10cm throw from full negative, to full positive in both the x and y, with a 1cm dead zone in the center, that'd make the movement all around more precise for me.
Lastly, I found that I accidentally activated the movement mid conversation or action a lot. I also think this may just be user error and something I should get use to, but I was thinking it'd be an improvement if it was a double-pinch to activate (like a double tap and hold). I feel like that'd significantly cut down the false activations I've had in conversations that I am using my hands to vocalize, or doing other motions that might be picked up as a pinch for some reason. I could also see it being a problem for those that do ASL in the game if that evolves with this update, though I have no personal experience with that, just something I was thinking about too.