Hi @ninetoincline, welcome to modular and Modular Grid!
A few comments:
-- your initial draft rig above isn't bad. Do consider if you need a dedicated audio out like 4ms listen, or if you don't need something like that given your intended use case(s).
-- DEFINITELY suggest you consider a larger case. Whatever your initial design is, it's best if you can have an additional 25-50% (or more) space left in your case so you can comfortably add some modules as you learn more
-- Pressure Points may or may not make sense in this build. Depends how you want to control things. It takes up relatively a lot of HP in this small draft case, so do consider if you really want / need it here.
-- of the modules you have above, I would consider Maths, PWN, Plaits, Quad VCA and Wasp very good (almost "no regrets") modules, so you definitely have some very useful picks already included.
-- IMO part of the joy of modular is complex oscillators (like Make Noise DPO or Instruo Cs-l) and wavefolders (like Intellijel Bifold); those do things that aren't easily done in VSTs or normal monosynths. Also part of the joy of modular is lots of modulation, and modulating modulators: to do that, you need enough modulation sources plus some control/mixing. Hence you might consider more modulation sources, things like Mutable Stages, Xaoc Batumi, Instruo Och-D, etc., plus a way to control and mix them like 4MS SISM, Tiptop MISO, and/or VCAs dedicated to your CV control.
-- almost everybody starting out underestimates the need and value of "utilities" in a modular system. In software and hardware synths, the utilities are generally in the "background" (e.g. not in the marketing material used to sell the synth) but are absolutely necessary to make everything else work. IMO a good way to learn modular utilities is to browse all the modules on Doepfer, Ladik, Joranalogue, Intellijel and Mutable Instruments catalogues, and to study anything that isn't obviously a sound source or filter. Mutable's Links and Kinks (or something like them) deserve to be in most modular systems. Keep in mind you need enough utilities in your rig to make the "fun" modules really shine.
-- last, I recommend you lookup user Lugia on this website, and examine a lot of his different draft racks. They tend to be very thoughtful and give excellent ideas of what different well-designed modular systems can look like. There are some good designs by other folks too, but I know for a fact there are a ton of interesting draft Lugia racks available to view.
Hopefully other folks on the forum can add some comments / further help for you.
Good luck, enjoy!
Nicholas