The secret of Leica M9 is not in its lenses, but in its Rangefinder focusing mechanism. (RF is the reason M9 is so expensive and RD1 was somewhat expensive as well)
Today, with high grade EVF, we don't need RF focusing mechanism to line up the image seen by the lens with image seen by the body. We can see thru the lens via sensor, presto, done.
Lenses for RF cameras were made by Canon, Konica, Zeiss, Voigtlanders and others for many years (even Olympus made a few) There is no problem there and manufacturing cost is not that high. If Konica could make Hexanon lenses that many agree match Leica image quality and exceeded Leica build quality for reasonable price, others can do it as well.
You are right about corners of the image being smeary, But this is due to the fact that the light falls on the sensor at very high angle, since the µ4/3 lens register distance is only 20mm. The solution is to move lens away from sensor lets say to 26mm so agle of light falling on the sensor will reduce, problem solved, (and call the new mount µFF or whatever
Why 26mm? just so there is a space for Leica adapter to go on and if 26 is still too short, fine go with Leica-M mount and problem solved. (works for Leica, will work for Olympus, no magic here, just optics)