Check all of your Mutable Instrument modules for compatible clones. The clones run the same software and have the same components. They are just generally more compact. Using the clones will give you more room in your case for future expansion (assuming your power supply can accommodate the additional power usage). Check out Michigan Synthworks for some decent Mutable clones.
The Make Noise Function is basically half of Maths. Any reason for this module? That 8HP can go to something a little more useful like Temps Utile or an Ornaments & Crime (two of my favorite modules, I keep mentioning them). You'll get a LOT more use out of one of those than the Function. Replace the Function, clock divider and Disting with TU and OC and I think you'd be happier in the end. Oh, you can also get rid of the Euclids module with the TU and buy back 2HP. The TU is around $250, so that one Euclids module covers half of the expense.
I do not see a filter. A small multimode filter would be great in this rack.
But back to the first point. Redesign this rack with Mutable clones and then consider what to do with the extra space.