The ability to return a list of discrete tags and their values sorted by time of change from the tags history.
The return dataset would look something like this:
time, tagpath/name, value
Currently, if the system has several hundred discrete points, and I want to find the root cause of an event, I would have to query the historian and then look through several hundred columns to try and find which tag changed. Having one change per row in the result set is much preferred.