The majority of your build seems to be Doepfer modules. They are fine. But you can have a lot more functionality from other manufacturers. But I do get your point of keeping things simple (i.e. - one knob one function). You can achieve this with other modules as well.
Pair this system down to as basic of a system as you can to create your first iteration. Then use it. Get to know the modules you're starting with and don't be afraid to modify your end-goal. Using the synthesizer and gaining experience WILL change your outlook and your priorities as you find your "voice", no pun intended.
I will second Lugia's Expert Sleeper recommendation. If you're going to tie your Eurorack to a DAW or other MIDI devices, the FH2 and its expansions will serve you better than what you've put together.
Bottom line is don't go all-in at once. It will be very expensive and you'll probably regret your decision.