I got Cubasis yesterday and, yes, I can control Micrologue’s filter cutoff with my EWI4000s wind controller.
I have to remap CC#2 to CC#1 with an external converter box and assign the modulation wheel to cutoff in Micrologue, but that’s not a big difference from the workarounds hardware synths require. The more things change, the more they stay the same. 
If MIDI learn is part of that future I’ll be ecstatic, but I’m happy to see it’s workable as it is. Micrologue has very smooth filter sweep response for an iOS synth.
Thanks for all the help.