That depends on if you see the Morgasmatron as just for filtering a VCO vs other things in your rack (eg. Multigrain). Hard to give specifics because usage is so subjective -- I'm not sure what you want this thing to sound like. If I were to swap the Dixie out with anything, for example, I'd swap it for a Cold Mac to add complexity/weridness to my CV, but maybe you want something more straightforward. I think the exercise for you at this point is to run through some imagined patches thinking about how you want the CV to interact with your modules and work backwards from there. Not sure if this is an unpopular opinion around here, but ChatGPT can actually be really helpful for this.

Looks like a really well designed case! Some people would say the point of modular is to create your own instrument's ethos instead of following that of a single manufacturer; but actually the point of modular is to do whatever you want. The Intellijel ecosystem is very robust.

A couple notes from my perspective:
- I think you're right -- ditch the 1u effect. A noise/random source would be good (though I think Pam's can do some of that too, so you're not totally without as is? I don't have one so I'm not sure).
- In general where I think you lack is CV utilities -- you can generate a fair amount between Quadrax, Tete, and Pam's, but you don't have a lot of options for mixing/scaling/offsetting let alone folding/comparing/rectifying etc. I wonder if you need all of Dixie/Morgasmatron/Rubicon: you've got a lot of voices for a small system. I'd maybe ditch either Rubicon or Dixie, and this is where I'd consider stepping out of the Intellijel ecosystem for a compact, CV toolbox type module and, if you have the space, a dediciated LFO (either complex, Batumi-style, or freeform Ochd-style, depending on your use) module perhaps.

Hope this helps. Happy Holidays!