Roster palettes

The OAM data applies to shop, loading screen and saving screen only. For those case, I think you are stuck with the OAM data you've found.

I'm not quite sure to understand your question... You would like to have a table of 14 palettes numbers and use this instead of the OAM data (as for palette)?

I'm not sure exactly where in bank C3 the palette number is extracted from the misc byte... All I know is that there's a pointer table for OAM data (see here) and then the OAM pointer is stored in $32C9. You can see an example of this in the C3/1903 routine. From there, I don't know what happens as I have never traced the code...

Again, I'm not sure what you mean and I feel a bit like a guy who's trying to show a sailor how to sail...

Edit: Good job on your patches! Amazing work.