I am not proficient in the technical details, but I have actually thought of those two issues posing a problem so as a personal comment, thanks for verifying that.

I'll leave the discussion on problems/solutions/workarounds to those in the know-how but from a user point of view I'd love the "hold camkey -> press volume rocker to rotate apps -> release camkey to choose app" functionality to achieve a "Matan-style alt-tab behaviour". I think. Hard to be sure before trying it in practice of course..