I think you would get something from adding a filter and more modulation, and I'd still be tempted to add more mixing (but that is mainly because I've recently realised I have far from enough mixing in my own rack).
I had a play around and tried to keep most of what you had and work with the space you had remaining:
I added the ochd and Ornaments & Crime for modulation and O_C is so flexible, it can also do sequencing or quantising, have a look at the videos for it and decide if its style of menu driven workflow could suit you... it could even delay your need for steppy and scales (but not remove the need longer term)
I also added squawk dirty and FX aid as end of chain effects and filtering.
If you were to take the Data out, I'd suggest looking at a second filter to add more flavour, maybe the ikarie would work well?
Data is fantastic, and its really helped me understand what my modules are doing and how to get more from them, but in a case this size its taking up a lot of real estate.
one thing that did occur to me, was to put the big honking button and the Data in a separate 4ms Pod alongside this case if you were set on its size.
If you want to grow this in the future, then I'd suggest looking at a bigger case, for all those nice modules you like the look of, you will need more space to make the most of them.