Seems to be lacking LFOs and modulation sources. Get one or two LFOs and throw in an Expert Sleepers Disting for experimentation. You have basic sequencing covered in your MIDI to CV converter if you have a DAW or hardware MIDI sequencer. Granted there are other uses for Eurorack sequencers other than triggering notes.
It's not a bad set-up as is. You seem to have plenty of room for expansion. I'd try using it with the Moog 55 for a couple of months and then analyze your own set-up for what seems to be lacking or what other areas you'd like to explore.
Have a plan for expansion, but don't be afraid to alter it as you learn more and realize your own style and themes.