Unfortunately, since the steam controller is so diverse it's hard to make changes. Like personally I believe the double touchpad to be a massive improvement over any other controller. It feels so much better than an analog stick with better feedback and control. But I can totally see analog sticks being a strong preference to people who want resistive feedback rather than haptic/texture. As well as people who grew up with normal controllers as their primary gaming device.

Honestly I hope for them to bring back the original Steam Controller more than anything else because it is the most ideal controller in my eyes as a preference.

I'd also be interested in seeing what they would make if they took stuff from the Index Knuckles.