Ahhh...yes, this makes way more sense. MG has a weird glitch where you need to make sure your Screenshot view is loading the same way as your actual build before posting anything with the build page's link in it. Probably explains the Rene-laden atrocity that was up previously.
This build only has a couple of things I'd consider making changes to. For one thing, you might want to find a way to add another oscillator (Plaits might be a good match to the Braids) so that you can thicken up the single-oscillator sound with a bit of detuning, mixing waveforms, that sort of thing. The other is something the combo of the Zadar and QPAS open up, and for that you'd want a second Quad VCA. Here's what I have in mind...
Let's say you had the above combo of modules. Now, given that the QPAS has the stereo pairs of all of its outputs, with two Quad VCAs you would then have the ability to set up a patch in which a few (or all?) of the QPAS outputs go to individual VCA inputs, with one Quad VCA being a "left" and the other a "right", and then by various configurations of Zadar output patching, you could create Zadar settings that would allow the various VCAs to have differing envelopes, morphing across the QPAS response outputs to create sounds that can change in timbre and spatialization across time. Given that the intent of the build is for ambient work, that would fit right in with your plans, potentially creating patches that can evolve across time depending on the envelope rates programmed into the Zadar. You would have to lose something to get this and the Plaits in, though...hmmmmm...
OK...this. Note that some of the modules from your build are missing, most notably the Erbe-verb. I would actually suggest going with either an external FX unit for this (more flexibility) or using some of the Clouds' potential for reverberant-type effects. I also removed the Pam's and went with a Tempi due to the fact that the Rene has the ability to work directly with it for some additional Rene functionality. You'd not have that with the Pam's.
Other changes...removed the Bastl VCF (sort of redundant with the QPAS) and the PICO DSP (again, an external FX unit being preferable here). There are also no mults; in this case, having jammed the cab with as much function as possible, I opted for a build that requires inline mult "widgets" or stackcables. In smaller cabs where every hp needs to be pure functionality, those optimize space more than one might suspect.
Added: obviously, the Plaits and the second Quad VCA. I also dropped in a Doepfer A-184-1, which gives you a ring modulator, slew limiter, and extra sample & hold in 4 hp. The Plaits and Braids are set up to split the outputs to two channels each of the Doepfer A-138s, which allows you to set up a separate right and left mix for the QPAS's stereo ins. I also added a 2hp MIDI module to allow very basic MIDI control, but more importantly, it also adds clock lockup to MIDI so that your Tempi/Rene combo can run in sync with external MIDI processes. I also put in a PICO OUT, which gives you a stereo output stepdown via a 3.5mm TRS jack, plus a headphone amp. Last added bit, since I had 1 hp left over, was a Konstant Labs power check module...the very best way to use a 1 hp space, I think.
This seems more "instrument-like", ultimately. The functionality is a bit dedicated, but within that there's a lot of leeway for sonic complexity.