A quick answer would be to use
whereused <table_name> <object_name>
instruction on to look for any of your exported list of object but... that could take a long time.
You could script something in the Web Visualization Tool xml or html export file too.
I assume we will wait together for better answers
Did you already used hit-count in order to look at rules which are no more used since 't' time (... and if a rule is no more used... you'll be able to delete it and maybe to have new 'unused' objects).
If you're interested, I've published a comment in which I'm starting to explain how to do.
Information Security enthusiast, CISSP, CCSP