Okay, so I tested the newest MC (Meaningful Colours) with the latest beta Vox Populi (10-10-1) and it's included EUI. What I found was, it was working exactly like the original RCI (Redesigned Colors and Icons). Well, more like not working at all unfortunally!
To begin my test I cleared my entire Civ V documents folder (and then added the mods again) so when I start Civ up again it creates clean game settings.
Working #1:
Deleting my entire documents folder (and then adding the mods again) lets me choose and play a game with MC completely working as long as I never close Civ or load a save.
Main Bug #1:
Loading the latest game save
without restarting Civ reverts my own Civ colours.
Main Bug #2:
Starting a new game with the same Civ also reverts my own Civ colours.
Main Bug #3 and probably the biggest:
Restarting Civ and loading the lastest game save, MC does not function on any Civs anymore.
In all 3 bugs I can see MC is indeed still active because switching to top view map changes other civs colours to MC's again.
This suggest something in the normal map view is not correctly implemented / activated, which goes back to the original RCI mod by dylansan and was
never fixed.
Link