I saw a tool once that was part of a larger toolset that did ACL parsing. I don't remember the name though. It cost something like $60K so I didn't spend much time looking at it. What I would do is clear the hit counts, let it run for a week or two, then create a new ACL allowing only lines with hit counts. Remove the old ACL from the interface and apply the new. You may get a few calls and you can open as you get them. If all heck breaks loose you can re-apply the old ACL to the interface and try again.
Hope that helps.
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