It would be very useful if a static 'time offset' value could be set as a property of data sources and/or points.

The value (entered in milliseconds) would offset the usual timestamp for the point.

This would be most helpful when instrumentation has a fixed delay between the measurement and the reading of that value via its data interface.
For example some panel meters we use seem to be delayed by some seconds, which can make it tricky to diagnose issues.