It depends on if you have metric definitions for these changes. There probably are metrics for assignments and state changes, but for priority/work notes there aren't.

What's your use case? It sounds like a very bad case of micro managing, but I  could be wrong. 

There isn't a reportable table that stores all of this. Your audit/history will tell you what happened on the record itself, but it's a very bad practice to report on these tables (too much data). 

If this is a high priority report, you could always create a custom table to catch these kinds of mutations and report on them. OOB, there isn't a way to do this.