It repeats some of the more conventional functionality of Maths, yes, but this frees your Maths up to do other interesting tasks like envelope generator, slew limiter, (low or high frequency) oscillator, subharmonics generator, envelope follower, filter (or just gives you more of the vital functions they share to control your modulations). You aren't really missing functions and tools in this setup - it's more about plumbing to ensure what you have does what you need.

Looking at this system, another idea is one of those 2hp passive low pass gate modules like the Meng Qi DPLPG or the Takaab 2LPG (which is almost better because it has a switch to change between no filter, some filter, and more filter, making it good for transitions or CV). I know you have the Optomix, and that one is great, but I have a 266t and those noise sources are great for percussion or weird sounds to send to resonant filters. It's an ungodly cheap and compact way to add more signal paths into your setup.

Frankly, blanks could also work at this point to create space between some of the smaller and denser modules for ergonomic purposes. Like all of my suggestions, really, this is based on the fact that what you have is already a very deep and powerful system that, supplemented with computer material, can provide you anything from drums and percussion to 60s art noise to pretty twinkly melodies and be very productive. I wouldn't add anything much more complicated to this and a computer (and whatever else you use, I guess) before stopping to practice, record (ABR - always be recording), make some songs with it, assess, and see how much progress you've made so far. Ultimately, you and your responses to what it does will be the best guide.