We often end up building a new alert using the exact same conditions when a team says "Hey, we want our CPU/Memory/Widget X alert delay to be YY minutes instead of ZZ minutes." The only reason we create the new alert is to change the alert trigger and/or reset delay.
I propose that the option for a custom property option be added so that we can specify delay by using node/application/volume/interface (as defined by the alert scope) custom property to define the delay and reduce the number of duplicate alerts.