Who maps L3 to Sprint, unless forced to? It's used far too frequently to relegate to a clunky stick press.
I bind Sprint to my ring finger pull (fingerprint), Jump on index, Crouch on middle. All three chain neatly for complex movement.
I like the d-pad and there are 24 buttons to map to whatever you want wherever you want.
Analog movement is the big one and Azeron does a great job of that by allowing it to be calibrated. It also works perfectly for wheel menus using an AUX with stick swap.
Azeron makes Azerons. Compact is IMHO the most comfortable and best model. I have the Classic and Cyborg and loathe the towers.
Having sprint right there on your left thumb is just intuitive. Moving forward and clicking in, almost like pushing into the ground with your feed to start a sprint IRL. It's not clunky on most controllers, it's however just not practical on the Azeron.
Maybe this is just the lifelong controller player in me speaking here, but I gather that controller players converting to mouse are the Azeron's primary market and several people I've spoken to have the same complaints re: key controller features missing from this cross-over device.
It's why I'm always confused by the lack of actual d-pad - really can't wrap my head around the discussion in the Azeron office about having this fiddly hat instead of just a tried and trusted d-pad.
So, for me, the Nav is the better device to pair with a mouse when using the XIM - the ergonomics, the actually functional L3 button, the actual d-pad... the only gripe of course is the lack of buttons that can be accessed without taking one's hand off the stick, but even then there are some tricks you can use to free up the thumb to access the d-pad on the move and of course mice with multiple buttons.
I manage to make it all work with a very simple G305 mouse as a battle royale player, but an extra button or two on the top of the Nav would of course be more convenient.