That's where I started on my ramble. The lower acceptable rof lately is part of what makes the Rize, enmy, and vibe workable. The low pressure / low force bolt is slow and it gets counted as a "feature". I've been backing off on the rof on my mags since 2006. That is a nice thing about electronic control; you can set it for the particular game.
While a new electronic frame would be more widely applicable, my daydream designs usually end up rail-less or integrated rail-frame layouts. It would cut out unibodies, but it opens up other possiblities.