I’ve pretty well acclimatized to the new Sidebar role but I do find myself wishing if the View could be remembered by the Preview.
I find myself swapping between
the Widescreen Preview with items in List View
the None Preview with items in Icon View
I have a Keyboard Maestro shortcut to implement the relevant Cmd+keystrokes but it would be nice if each Preview mode simply remembered the last View it had. I could stick with your keyboard shortcuts.