More tests would reveal more carriers, yes. But at the same time, the curve would be more accurate, no? If the curve isn't going down DESPITE more tests being done, wouldn't that indicate that the problem is not getting better at all?

The curve is more accurate going forward for sure, but it's possible to record an increase in new cases each day simply by doing more tests, even as the number of new cases per capita declines. This effect theoretically wouldn't stop until you were testing basically everyone, at which point the new cases per capita and the new cases would be the same.

you are right, the testing page shows half the positive rate and far higher testing. I was wrong here, its likely that AZ cases are dropping