It's both wise and courteous to demonstrate interest and consider an examiner's suggestions, some of them know stuff. However, if the technique replicates information you already have, being polite doesn't require you to waste limited resources. Your examiner has no way to "follow through" with a recommendation unless she puts it in the written report and this one is too specific to be appropriate unless she can point to activity you missed that its use would have brought to your attention.
I'm curious about the existence of a FinCEN report like the one your examiner touts, but would instantly point out that P*Q's is more valuable as it could include amounts below the reporting threshold. Some of those transactions are more interesting than those that were reported.
_________________________
In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.