Seems better at first, but losing the Optomix means you lose the audio VCAs. I agree with the Sinc Iter move, tho...
But, another idea: since you need some percussives, why not use a small, separate cab for just percussion modules and put those under the control of something like, say, a BeatStep Pro? By removing drums to that, you'll be able to open up the space for the output module as well as bring back the Optomix. And also, jamming something like 6-8 percussion voices into a 42 hp powered cab is relatively easy. Something like...