The other is the art. I don't have a problem with the necks so much, it is the eyes. When they draw Saturn Girl looking to the left they draw the pupils going to the corners of her eyes, since her eyes are heavily slanted one pupil goes up and the other down. Phantom Girls eyes are simply terrible. The cartoonists need some basic anatomy lessons apparently.
The only other quibble I have is that the voices are all far too similar.
Also, dating almost never interfered with heroing in the comics. And damn Brainy is bitchy. And really, Alexis becoming evil? Trite. Had she joined the Legion to be close to Superman that'd've been much cooler.
On the plus side, I like what they're doing with everyone's powers. Also: Tyroc!