Thanks for the link, but that study was very soon after the change and ignores the issue of whether vaccine effectiveness was the same (as history appears to be

Thanks for the link, but that study was very soon after the change and ignores the issue of whether vaccine effectiveness was the same (as history appears to be showing it was not). And that is the point. A small reduction of minor reported adverse effects for a large reduction of immunization effectiveness is usually not counted as a good trade-off by epidemiologists.