Well, since we're talking radical and retro, and since we may not ever get interchangeable lenses, what about a pair of high quality supplementary slip-on lenses that give equivalent focal lengths of 28 and 50 when placed over the prime (equivalent) 35mm?
We used to use them, and with the big sensor the IQ might not suffer too much at all by comparison, with M43 for example.
No changes required to lens automation or other features, no changes to the OVF/EVF, no changes to maximum aperture, less expensive than primes and smaller and lighter.
Just sayin'.