"1.) What else can I do, as a developer, to make users feel more involved?"

Hey Davin!
One of the most responsive devs are those that
a. respond quickly
b. actively develop their software
c. integrate suggestions quickly

In Linux Audio excellent response I get from Rui on his Qtractor and on Giada.

All in all, it is always best when software is developed actively. Real problems arise,
when development slows down or comes to a halt.

Louigi.