I did not totally follow your description of the ribs changing thickness, but I suspect the wing will fly just fine. I designed an Aichi "Val" with a 23xx airfoil and used the tools my CAD program to modify the airfoil to form the elliptical outline and to have the thickness at the spar taper in a straight line. Hence the 2315 at the root was distorted at each of the other rib stations. The plane flew great.
Chuck
