Is there any facility for one of the assignable buttons to be used to put a mark in the metadata to mark a no good take or a good one? I've seen this on a few cameras, I think PDW700 being one, so if you shoot say 10 takes of a bird and in just one of them it takes flight or does something else of note, just before you stop recording you can hit the shot marker button and it'll put a tick on the thumbnail. Alternatively pressing a button for an NG take will show an X on the thumbnail. In this way once you've loaded your clips you can go through and pick out the good shot or delete the NG ones.
This seems particularly of use before we get preroll - if I want to get a slomo shot of a bird taking flight, at the moment all I can do is roll when I think it might happen, so I could end up with 20 shots with nothing happening and only on the 20th get the shot - if I mark this with a tick then after loading the clips I can delete all the others.