I think the most important concern here is not region wealth per se but relevance. We don't want to have regions in the game which people simply shun because of the tweaked realm size rules. Or entire swaths of land in the middle of the map when a realm is supposed to flourish but we actually see wasteland.
The "players should know when to kill the realm" does not solve anything because those lands will still sit there as a prop instead of being a part of the game.
OI regions do need an economic boost to be relevant again. But Bursa, for example, is a strategic region and people want to own it.
Then again Dayr and Caqueta are so poor and so poorly situated that they will normally be ignored even though they are coreland regions for their respective realms.
I think the logic here should be not just to balance resource production but to make the map make sense as if we were playing a war board game.
