Is there a way to customize the "Top Properties" page to supply different/more fields?
Those are fix. You're welcome to submit a Product Enhancement Request for if you do see possible fields for application.
McAfee Corporate KB - How to submit a new Product Idea (formerly Product Enhancement Request) KB6002...
Just on a side note:
You can create a rule using specific Criteria and set Action to continue just to see the value of this Criteria in Rule Trace.