I agree Freeheel,
having the option to keep the M/S ISOs in their original format would be preferred.
Throwback,
With the MP6, I'm usually running two stereo pairs in tandem. With the M/S pair, I know I'll be processing the matrix in post, archiving my Polywaves in split pairs. But in the field I would prefer to monitor the decoded M/S mixed with the secondary stereo pair on the main LR bus.
FWIW: A double mid side routing option would be a welcomed addition to both the channel linking and HP presets.
-m