With the new request tracing for content sources - it would be great if rather than being an hard on or off switch, that you could specify which content sources to enable tracing on. This would allow the request tracing to be turned on for non ARC content sources in a production environment to enable better logging for third party calls without the overhead of tracing for all content sources.
Thanks for submitting this idea, Matt. It definitely makes sense for developers to explicitly turn on/off request tracing for specific content sources. I'll check this with the Engine team and evaluate its feasibility.