I'm not entirely sure I understood it correctly but to me it looked very much like the STEEM-to-SBD (also known as 'reverse') conversion idea which has been proposed by others (perhaps you were not aware of this and reinvented it. I believe it is feasible, but: a) The coding for it is somewhat involved as it requires both designing the details of how it would work in every situation as well as coding it, which requires a new operation and other code changes (along with associated testing); and b) I'm not sure it has enough support to get adopted at this time (though it might).