Well, Brian, at least you and I agree that poring over MTF graphs is a thankless task. I also agree the collapsible Elmar is an interesting lens in the way it, well, collapses, but the zenith of Leica/Leitz's lens design skills it is not.
You won't be surprised to hear that I don't agree with your characterisation of "modern Leica lenses". I assume by "clinical" that you mean the lenses are too sharp and too contrasty and by "contrived Bokeh" that it is too well controlled and pleasant to look at. As for plasticity, I have no idea what you mean, perhaps this is some unfathomable oblique reference to the use of plastic in Canon lens barrels...