I don't think Bores idea is one possible two feasible and three shouldn't happen. The other system in place makes more sense. It ones makes sure it's not even close to partisan, let's the regional legislature decide on who would be the best for their own region. And lastly lets more active members get in their instead of somebody from ANUS or NNP who's main goals are to kill and tear the game apart.
Oh and Bore reopen the stock markets now.
lol
I doubt atlasia has more than 25 active members so I'd be surprised if there are any active members who want to be in the ConCon but are frozen out, for instance even the supposedly superactive senate is half dead in terms of membership. By making people who want to serve actively have to announce their candidacy and face an election you will actually get more active people, as opposed to a governor or chairman choosing inactive hacks.
Going through your (attempted?) list of why you don't like my suggestion, it's obviously possible, feasible means the same thing as possible and shouldn't happen is just you saying you don't like it, which we already knew.
As for your defence of the other proposal, the idea that it's less partisan is laughable, as it literally involves party chairman choosing seats, along with both a senate and governors who are just as, if not far more, partisan than voters.