+1 Even if the engine is limited I’d sacrifice the number of groups/auxes for more auxes. Or even stereo matrixes for 2 mono matrixes per.
My current workaround is to use a mono aux set to post fader and send all my groups/inputs at 0Db to the aux then link outputs to a DCA for overall mute and level control if needs be and mix as (relatively) normal. Yes this is awkward and can mess with your head if you aren’t on top of things but it does work.
Hopefully mono matrixes with better mixer/bus config comes soon.