The last firmware update was May 2016. I think A&H have abandoned the QU Series all together. I would have like to have seen a multi-band compressor put in the onboard processors and mentioned it. Nothing was said by the A&H reps either way. It’s like they avoid any suggestions or comments for modifications or anything else on the QU Series.
I know it’s an extra piece of gear to have to carry and set up, but you can track all channels with a computer using the USB B output on the back of the board. That’s probably the answer you would get from the A&H reps if they were to even grace you with an answer to your question.