Wow. I do love what you're doing with this. While I'd have loved to see them do a bit more with the TNG sets to make them more like the TMP to TVH sets, this works oh so well as a nice stop gap. It does feel like it's an older ship as well.
If you are looking to do something with the LCARS TNG panels on the walls, you could have it so it only sports the older LCARS when someone's walking by the panel or interacts with it. I don't remember them being active all the time on Next Gen either so that'd make sense.
If we go by MSGTTE only the saucer decks had specific colors to the padding and the secondary hull was just the metal panels regular silver color.
If you are looking to do something with the LCARS TNG panels on the walls, you could have it so it only sports the older LCARS when someone's walking by the panel or interacts with it. I don't remember them being active all the time on Next Gen either so that'd make sense.
So, if there are at least 20 decks on the starship, there would have to be at least 20 distinct colors to correspond with them?
If we go by MSGTTE only the saucer decks had specific colors to the padding and the secondary hull was just the metal panels regular silver color.