Howdy!
Absolutely nothing wrong with this system, this looks like an excellent complement to the System Cartesian. The only thing that could be wrong is if you're patching with it and feel like you're missing something. I personally would want another source of modulation or two, as all of your sound sources and effects are super fun when modulated. Given the sound sources you have I'd say to either drop the Doepfer mixer and keep the LXD/ModDeMix combo (or vice versa) and fill the gap with extra LFOs or envelopes. Something like the Mutable Peaks is very versatile (a clone would be most cost effective), or depending on how you're patching the Ochd + expander could fit. If you want to keep in the Make Noise family, the new multimod could be a great way to generate a bunch of modulation on its own or manipulate the existing sources in Maths and Wogglebug.
Cheers and happy patching!