I realize that this is not a pressing issue compared to the drastic imbalances in gameplay and mechanics, but it is annoying from a quality of life standpoint.
I would really love to see Lilith increase the cap of House ministers to greater than 5. I would love to see it moved to 10. Given that the structure of the changes in the game all encourage consolidation into a few, larger Houses with high population and large numbers of cities, it becomes difficult managing all the different needs with only 5 minister spots. Plus, when you have hundreds of players, there is definitely more than 5 deserving of a spot.
Even if Lilith would allow additional spots to unlock upon tier increases (one spot at 5, 10, 15 etc.) that would be great. Again, not a monumental concern, but it would be a very nice update to a mechanic that was developed long before game changes were made to encourage consolidation into larger Houses.