@saladmix, some quick comments:
-- layout could be improved. If I was using it, I'd have i) all oscillators upper ii) all filters / waveshapers iii) all CV iv) all FX, roughly ordered from upper left to lower right, with Utilities put in where most convenient. Layout is rather subjective but IMO this could be improved somewhat.
-- overall the rack design seems pretty solid BUT maybe a bit unbalanced in terms of % of modules. Maybe a bit heavy on oscillators/voices and on mixing capacity, may be a bit light on envelopes/LFOs and utilities.
-- recommended adds if you have space: the expanders for Metropolix and/or Quadra. These are low HP/$s high value adds. Instruo Ochd is a good way to add LFO capacity.
-- maybe I missed it but what is the signal in/out setup here? Are you going into a DAW for recording, etc.? Do you have enough in/out for current and future needs? Something like Expert Sleepers ES-8 or 9 might be worth considering if needed.
That's about all I can offer for now without knowing more about your intended use cases. How many voices do you want to get out of this at one time? And what is the main use scenario -- recording into DAW, jamming for fun, etc?