@simonvanderveldt
an area I’ve struggled with/still exploring is balancing the number of voices with creating interest.
I bought quite a few ‘voices’ , but the issue is for every voice, I found to make them more interesting, I needed lfo’s, env’s, vca’s… and potentially attenuators, and mixers. these all take up valuable rack space.
(then there are other interesting modular items like cv switches which might be fun)
imagine a desktop (mono) synth that just had one envelope and one lfo… it be considered pretty light on modulation… many these days will have at least a couple of each.
so the concern in my rack, is that id end up with lots of voices, but they might end up quite sterile.
in fairness, my rack is focused around MI modules, which contain built-in attenuators and vcas…
but still I realised that to get the most out of these modules, I want to be modulating them…
(clouds/microcell is an example that I really like quite a bit of modulation on )
I’ve also started exploring mixing CV modulation signals to create more interesting shapes, but again, that needs more vcas/mixers.
now this is very personal, but for me, its seems this is where modular is different, you have so many modulation possibilities, and thats an area I enjoy playing with.
thats not to say this is necessarily relevant to you/your rack, you have quite a lot of modulation source, but 4 voices might require a lot of modulation/control.
I guess at the end of the day, we all have to balance rack space and what we want / need 
a kind of general question… of canvasing of thoughts here…
my feeling is that modular voices take up quite a bit of ‘space’ and are often a bit more ‘complex’ that traditional voices, so you don’t need to have that many to create some nice pieces.
so perhaps you can get away with fewer voices?