If, per say, you wanted to "move up the charts" (which charts I assume you mean land/nw) you would need to gain land to more easily move up since we can say land produces more to NW than books of science or actual gc resource right?
Wouldn't it better serve a kingdom to have a mix of both land gains AND learn/plunder so that the kingdom can move into a Fort stance after a few days of Peace to rebuild on?
Especially if we want to say that typically kingdoms fresh out of war will have a unbalance of land sizes among big provs and small/chained provs...but instead of encouraging smaller attacker to grow in land OOW and come up to the KD Acre Median, they prefer to enforce no land gain policy or even lower kd acre median size (land drop) and staying among targets with poor science levels.
For less organized ghettos (unlike yours 2Utopian) it seems to me the wrong message to give and puts nubs, either learning the game or re-learning the game, in a position where they can be hit more often and will also slow their learning progression because of the losses.