A few other points, also...first up, you don't have enough sources that require stabilized CV for pitch, so the buffered mult is pretty useless here. Rule of thumb is that once you get beyond feeding three sources with the same CV, you'll want to buffer that to avoid CV sag and resulting tuning problems...but with what you have here, you won't need this. Just mult things out with inline mults or stackcables, and you'll be golden.
Now, having removed the buffered mult, you now have an 8 hp hole. So...try this: remove one of the Quad VCAs altogether. Then into the hole, put a Happy Nerding 3xVCA, and use this in THAT position for your CV/mod level control, and the remaining Quad VCA for your audio + mix to mono. This leaves a free 2 hp there in the second row (2hp DC-coupled mixer for CV/mod combination?), and 12 up top. My next move there would be to add one more device, something you can use as a doubler for one (or both) of the audio samplers. Like this: https://www.modulargrid.net/e/flight-of-harmony-sound-of-shadows which is a delay line that would work great for doubling, plus it also offers an insert loop in the delay's feedback path for even more fun. It's sorta gritty, too...adds character, done right. That way, you don't have to tie up the Mimeophon for simple delays, making it more useful for global delays/loops.