Have you noticed that the numbers are always wrong, but that they are often wrong in the same way? Rooks are always stronger than their numbers; short Rooks are always weaker than their numbers.
Maybe one of these days I'll find a fudge factor that makes it all come out right.
Meanwhile, new ideas are emerging faster than I can wite them down, so I don't have time to try to nail down the magic number of the necessary fudge factor.