I would like to see an enhancement to the dynamic thresholds that would allow the dynamic threshold to be recalculated based on a time schedule that is customizable. This would allow the threshold limit to raise or lower depending on the behavior of the metric. To avoid slow creep, an absolute min or max could be set and alerted upon. The current system does not appear to be dynamic, since the threshold has to be re-calculated manually to apply a new value. (as best as I can tell)
Jim