Note: the motivation of the two-page layout is primarily for performance, not for design. On iPhone, in fact, there aren't two pages. The only support needed for that is, mostly, a "move to page" button, though it's hard to move controls between banks on iPhone right now.
As far as providing a way for users to share pieces of layouts and perhaps presets... that will be happening with pages, first.
I really appreciate the suggestions. Don't worry about overwhelming the forum with suggestions. That's what it's for.
Thanks!