No. But I'm saying that although I can accept that a cosmic contraction would mathematically be the same as cosmic expansion, I suspected that if everything really were shrinking we'd encounter difficulties. (Buffoon alert: I'm very deep into your area of expertise here, so I'm treading lightly.) I was specifically thinking of the fact that particles would be getting smaller, atomic nuclei would be smaller, reactions would occur over smaller distances, thus they'd occur faster (the speed of light wouldn't change). With no deep analysis of this, I was gussing (always a risk) that the observable consequences of a shrinking and speeded-up universe would be different than for an expanding universe.
Good thought, but I did specify that rulers would shrink, and the speed of light is, in the deepest sense, merely a ruler. It relates physical distance scales to physical time durations. We aren't changing the time scale, but we are changing the length scale, so the speed of light will be compelled to shrink right along with everything else.