Decimal,
my wish list for Oly is manual focus on the casing, a dome port (end-user replaceable), ditch the space for the EVF 2, better ergonomics for the bulge for the right hand, better bouancy when fitted with 2 strobes...(it goes straight down to davy jones locker when released) and a flip adapter for wet lenses instead of a pry-to-open.[/QUOTE]
#1 the zoom wheel on the housing will work for manual focus when someone makes a gear for lenses like the Pany 45 mm macro.
#2 Zen already makes a dome port for the Olympus 9-18 zoom,
Welcome to zenunderwater.com! and three more are in the works for the Pany 7-14 zoom, 8 mm fisheye and 45 macro, all user interchangable.
#3 If you "ditch" the space for the EVF-2 it won't result in #4 better buoyancy it will make it worse. U/W photography is a tradeoff, if you make the housing smaller like the outstanding Nauticam housing for the Sony NEX-5 then the trade off is loss of traped air inside the housing and guess what, loss of buoyancy. This can be resolved with float arms.
#5 since the wet lenses that can be used with this housing are the 67 mm threaded closeup lenses like the Inon UCL165M67 Olympus already released a $45.00 adapter that fits on the front of the stock Oly port.
Phil Rudin