I'm not quite sure what the angle is here, are you saying that too many cases are being registered because of the low positive testing threshold?
That's plausible, would answer why death rate seemed to drop during Delta strain. Which means the death rate is actually higher than stated as too many are being classified as positive when not. Death from covid is measured differently than just being positive, the cause of death would have to be symptomatic with the virus to be assigned that cause.