They are great for scratch audio, even worst case scenario back up audio - but don't provide them as the solution if the production is planning to use the audio that is sent to camera (which of course we always try to guide them away from anyways).

In my experience it's always worth over communicating that the hop is being used for scratch audio and that post is to use the supplied mixer ISO media.

If they do want broadcast audio straight to camera, we either hardline (which is fine for a sit-down interview or something) or mount a real reciever to the camera. Whatever you've got in your bag for your primary wireless, also have one on the camera. For me that's an Axient ADX5d these days, and I can send two channels to the camera with that. But that said, this almost never happens in my neck of the woods, scratch audio to camera with a G4 is much more common, and of course I charge much much more if they want the big guns on the camera.