If this idea is already here, please forgive my post. Admin please delete if it that is the case.
Here goes my 2 cents worth... How hard would it be to add digital gains into the software along with the existing hardware gains already in the chassis? Digital would mean that once gains are set, they could be stored under snapshots for instant recall, especially if the knobs/pots get mucked up either in transit, or by itchy fingers.
In reality I'm probably off base about a software upgrade to address this one area. It may have to wait for an upgrade to the current hardware/next generation of DL Mixers. Hope springs eternal!