For me, the Deck's trackpads are half way between my thumb knuckles with my hands in a comfortable position, so they're not nice to reach for, whereas everything's a comfortable distance away on the original Steam controller. I have big hands, so maybe you've got small hands?

On the Steam Controller I use the touchpads for

• consistent 180 turns
• quick switching between items/abilities
• movement

With all the swiping and clicking I do in combination with the back button usage the touchpad placement led to putting strain on my hands. I don't feel that discomfort with the joysticks, which feel comfortable in its placement and reachability of all the inputs around it.

And the 180 consistency I have hard time replicating with my natural swipe pattern despite adjusting the rotation in Steam Input, so I have to do corner to corner swipes due to Valve going with a square over a circle. The layout is one where I'm having to force my hand out of what would naturally feel comfortable.