Absolutely some good ideas. And I totally agree about one of the values here which is getting unobtainable combinations. The ability to take a raft of lenses and convert them all to something new and in most cases more interesting is a main draw of the SB.
Also of interest is what the character of the shots will be... Especially wide open. No amount of silly tests will show that, only real world attempts.
My purpose of doing this was to attempt together an idea as to how sharpness was affected as that is another draw of the SB. Now for instance, I know that not only do I have an unobtainable 50-105f2.5 and 140 f2.8, but they perform better in terms of sharpness.
Other lenses like the 28f2 that becomes a 20f1.4, I have to see how the real world treats it, and how does it compare to my 20f1.7. The 50mm f1.4 becoming an f1.0 lens is crazy fun although the 2x crop makes its effective fov a little less interesting for me.
Frankly, I find these sorts of tests only so useful, but they did point out some interesting things to me (the reduce in fringing, the color shift, a perceived increase of contrast, the smearing of the edges on some lenses).