It's my hope that future, second-generation bullpups will have either downward ejection or forward-thru-the-foreend expulsion of fired brass; ambidextrous in either event. And I've played with a top-mounted magazine for an AK that worked pretty well, after the fashion of the British Bren gun or Australian Diggers' beloved Owen guns. This allows large capacity magazines that don't drag in the dirt when prone, and make for fast magazine changes.
With today's penchant for electro-optical sights, a rail for sight units can be placed on both sides of the weapon and the sight unit mounted on either, per operator preference, with a backup iron sight unit going on the other side. Alternately, an auxilliary sight unit for a underbarrel grenade launcher can be fitted instead of either.
I'm working on it; have patience!<p. -archy-/-