I agree 100%, having the ability to cut offending frequencies, and still have a second EQ to do tone/color would be great.
More than that, I would love a better implementation for Room EQ than the GEQ, something with a bit more precision than a GEQ.
To answer your question about EQ for Aux monitor sends, you can actually assign a GEQ for each output individually. Same as for main output. Select the Aux or Main channel, click on GEQ, click on Assign (right top in Universal Control) and make sure GEQ is switched on for that output) go back to GEQ and modify for each output. You can also save GEQ presets. I have a separate GEQ for FOH, and each Aux send in my 32R.