At first I would think about including an effects module. Minimum FX Aid https://www.modulargrid.net/e/happy-nerding-fx-aid-black-gold but I would recommend a clone of MI Clouds, for example https://www.modulargrid.net/e/after-later -audio-monsoon and to semi-randomly sequence gates and cv a clone of MI Marbles, for example https://www.modulargrid.net/e/after-later-audio-antumbra-cara. I think these two modules would perfectly complement your voices.
In the utilities field, better 4 than 2 vcas, with a contained price you have NANO MODULES ALT https://www.modulargrid.net/e/nano-modules-alt and a somewhat more expensive classic, but easily found in the second-hand market Intellijel quad vca https://www.modulargrid.net/e/intellijel-quad-vca.
You could remove the 2HP Tune and the Doepfer A-160-5.
I would add a filter perhaps, but you only have 4Hp left free...
Without jumping to the second case, it would remain like this.
That is my modest suggestion.
ModularGrid Rack