Yes I used this, but this is not really easy...
About option 1: when we sort by policy name, we cannot sort in the same time by rule number.....
With more than 500 object usage, this is not really easy to find what want...
About option 2: It will search groups that hold this object and the network that include this object.
A lot of useless result....
These approaches is the only way to proceed, but not really easy to use.
The best way to do this right now is the script provided by Robert Decker !
I'm waiting to get back this feature in next release !!