Completely agree with you. You can only introduce the whole team at once if they are known quantities or if you are going the anime route of starting the story in the middle and trusting that the audience will stick with you long enough to figure things out on their own.

I would also like to add that outside of Morrison's Big 7 JLA stories seem to work best when a small group of leaguers are focused on per issue. That is especially important when we don't yet really know these incarnations of the characters.

I enjoyed the first issue. I thought it was fun, everyone used their powers in a well defined iconic way and honestly I am having a lot of fun with the cocky "rookie" versions of the characters so far. I don't want them to stay that way, but its enjoyable watching young driven alpha males have their first real dick measuring contest.