League points changed the incentives in territories.
Now, there is incentive to attack territories but much less incentive to hold smaller territories.
Change the league scoring in territories from solo to faction league points, and increase the point values appropriately.
The bigger change would be that the faction points are not awarded after a battle. Territories would each get a point bank. When factions attack a territory, their points would go into a temp bank.
The points from the faction who wins the territory would get added to the point bank for the territory. 2% of the points from the territory bank would get awarded to the holding faction each hour. This would help encourage factions to stop abandoning territories.
One interesting angle to this change could be for the territory banks to be stealable.
For solo points, maybe award them for successful defenses.