Maybe by setting the gyroscope to directional pad and lowering the sensitivity? There are a few ways you could do it, those things likely the most customizable controller ever made.

Yup, and the remapping tool is killer and supports absolutely everything and has browsable and sharable configs that work like spotify playlists. They absolutely did their best to make it a hit. The quality of work they put into building the software for my SC is exactly why I'm reserving a Deck today.

Oh right, the controller has a gyro as well - something which for some reason Valve completely failed to advertise. You can use it both to aim and as a kind of spatial D-Pad (among a lot of other options).