Sounds fantastic. I shoot m43 and have been seeking an all-in-one set up for years. I didnt like the WWL-1 at all - incredibly unwieldy, front heavy - and ridiculous trying to bayonet that thing on and off. Hopefully this is reasonably balanced with a flip diopter holder.
Yes, this is also my hope. Curious to see more reports once they get into the hands of others. I wonder how it works, but in theory it should work in with the 12-50 at 30mm as well. It's so hard to test these things for yourself though, when they cost 2k€...