It would be a good idea to be able to attach Label to dates. It will help correlate the events with a trend change. For example "New Release deployed" or "New marketing campaign rolled out" will help understand the significant trends change. Some of the desired features i could think ofAdd friendly ...

Every rule should have a quick view button next to it. The quick view should show all the metadata (event configuration, conditions and actions) expended in a single view. This will be very helpful in reviewing / validating rules.