I would like a sliding panel that is a minimum 400px that is approx 30% of the screen width but that is 100% width on mobile as the screens are so small. This is low priority ask as current functionality is very workable, but the ability to define min widths and mobile responsiveness on sliding panels would round out their design domination.
Oh, and… while I have your attention… sliding panels on mobile safari sometimes translate swipes to the hidden layers instead of the topmost panel. If you had a mobile responsive option that set the panel to 100% width then maybe you could do it in a way that ensured interactions affect only the top panel. 

Thanks for all you do!