These Leagues would be:
Adding Node Leagues directly improves game, here's why(short version):
-New players can compete immediately from the start
-Shows which nodes are necessary for Ai trees
-Develops tutorial and the game as a whole.
-Focus would be on efficiency rather than complexity
-Having a node league is FUN!
I think this would be a great way to give New players a chance to create competitive ais from the go. And in order to make a small ai super efficient, you want to learn as many features as possible. This would lead to better overall ai in Unlimited/Normal League as well!