That's not a bad idea, it would probably be more natural than the rigid filters that are currently in place for the requests and profiles. As far as having this running in prod I've only really thought of siphoning off the results to celery or something similar to avoid impacting response time, but a spray and pray at Elasticsearch would work just as well.

What's nice about the current setup is that it takes very little effort to get up and running but I suppose could make that configurable...

If you are looking for something like newrelic you might want to give https://appenlight.com a try.

I've put a lot of love into it and it can give you tons of information about your application.