[Aku]

Well having indep at like 6 you can sometimes use strong indeps as a layer from the enemy. Basically indep 3 is too much of a push over and don't attack on the first turn like you can do with indep 3 because you dont want a catastrophic defeat that hurts your early game.

I personally like higher indep strength because it makes it more fun because on indep 3 they may as well be empty provinces lol. It is like how Halo was a 100 times better and more fun on legendary mode than it was on the easier difficulties.