Thanks for the suggestion. I can see where that could save some time. Note that you can do this currently if you run two separate ingests. You could use {type} in your folder name so that you would not need to change the ingest location for each ingest. Run one ingest to, say, {datesort}/{type} and choose "Copy RAW photos only" and the files would go into 20150708/RAW run the same Ingest, but choose "Copy non-RAW Photos only" and the files will Ingest to 20150708/JPEG. The end result would take only a second or two longer than the feature you request.
I hope this helps you in the meantime.
-Mick