sorry if I misread this, but the softer tire has less side bite (A30 is looser than the A35?)
Is this still so with itty-bitty tire sizes?
Not sure what your definition of itty-bitty is, but I know that at 40.5 to 41mm the car rotates better with A30 than with A35. It sounds backwards at first, but when I drove them back-to-back here at 5280 the A30 definitely seems to let the car rotate more.
I was originally using A35/TP on my 13.5 car and it was just too pushy for my taste. Rather than going to a more aggressive front, I tried the A30 in the rear and it worked like a charm. Something to try, I suppose.