I'd like to know the actual resolution of a lens regardless of body.
Why? Academia? Don't get me wrong, there is nothing wrong in and of itself that I can see, but seeing as how we pay thousands of dollars for these lenses that we can't use without bodies I question any results relevance.
Ask yourself this question. Why, when DPReview tests a body, do they use a quality prime at an optimal aperture, mounted to a heavy studio tripod, with careful focus bracketing and remote release?
The answer is, so that the lens so dramatically out-resolves the body that the results you get are almost entirely limited by the body itself.
Why do you want that? So that you can estimate how the body will perform with other lenses.
Same thing with lenses. How does the lens perform by itself? You want to know that so you can estimate how it will perform with any body.
If you don't do that, you're left testing every possible lens/body combination and retesting every lens every time a new body is released.
Convolution allows you to avoid that.
1/R^2 = 1/Rs^2 + 1/Rl^2, where R is system resolution, Rs is sensor resolution, and Rl is lens resolution.
If you know Rs and Rl independently, you can find R.