What is the limitation that you speak of?
Until/if we add such a feature (splitting RAW and JPEG apart on Ingest) you can use the Copy dialog with the Move option checked, and then change the RAW+JPEG handling popup to "Copy RAW files only" and this will allow you to bulk move your RAW files away from your JPEGs. I know it's another step but it is fairly automated...
Lightroom currently has a "feature" such that if you import a folder containing RAW+JPEG pairs, it only shows the RAW images, and you cannot stack the pairs, or process the JPEGs. The workaround is to separate the RAW and JPEG files into separate folders, import those, then move the JPEGs (or RAWs) into the main folder. After doing that, both filetypes can be seen, processed, stacked, or whatever. No one seems to understand the logic behind this implementation, and hopefully it will be changed in an update.
However, after thinking through the complete workflow to handle RAW/JPEG pairs, there would actually be less steps involved to do what you have suggested.
But, there have been other occasions where I've had to split the pairs, and obviously others seem to have needs, so it might be a useful addition at some point.
Thanks.
