If you want the MIDI input to work on your Intellijel case, you'll need one of their 1U MIDI output modules to connect to it. If you don't need that, then you're fine, but it might help for sending pitch and gate information to the Crust and its other firmwares (Pizza is a great oscillator, and the Basil is not only a great delay but an interesting Karplus-Strong voice). Unfortunately, there isn't much room for my next suggestion, which would be a hands-on source of free-running modulation (LFO, function generator, etc).
Overall, I think this can absolutely be used as it is, but I am wondering how committed you are to the Palette case. They are pretty expensive and require at least two extra modules (a 1U MIDI out and a 1U stereo out) in order to get all the functionality you need. The 1U modules you've chosen can easily be found in 3U format. In other words, a lot the extras that make this case so expensive don't seem to be a concern for you, unless I am mistaken. Will you be using this alongside MIDI sequencing and mixing things outside of the rack?