Yeah, What you are doing is definitely more the strong point of a workstation. I tend to keep things inside the arranger as much as possible, except for editing in the DAW.
The Makeup Tools are FAR more powerful that your DAW for fine tuning certain aspects of the sequence. I usually made a point of transferring the sequence BACK to the BK9 for final adjusting, and adding MFX to Song Parts that could benefit, EQ etc.
And, quite honestly, there are SO many sounds in the BK, calling them up using an instrument definition file doesn’t really help! I couldn’t name a dozen sounds off the top of my head!
Interesting thought… never tried this myself, but theoretically (if you set up the MIDI stuff right) wouldn’t calling a Tone up from the keyboard (on a Keyboard Part) automatically send the 00/32/PC code out? If you set up a track in Camewalk that then echoes JUST the 00/32/PC on its new channel, wouldn’t that then set the DAW track to the same Tone as you just used on the KBD Part?
I hardly ever found the .ins files very useful. It’s been so many years since anything had so few sounds that I could remember the names. I know it sounds like a great idea, but in practice, not so much. Make sure BEFORE you spend a ton of time doing this that you really know your entire ROM by name well enough for it to be useful…
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An arranger is just a tool. What matters is what you build with it..!