A warning which warns users that changes made to custom clean do not carry over to Healthcheck. Have this warning have a “do not show again” box.
I would go further and say that such a warning should be in BOTH Custom Clean and (especially) Health Check.
Also options>cookies needs to be explicit about the fact healthcheck (for whatever reason) ignores this option
And on include/exclude (though they say “Advanced user only” but that term is nowhere on custom clean or health check)