This isn't Man of Steel 2. This is basically a Justice League prequel/set-up. With that being said, I agree that it looks a little stuffed (and that worries me).
I didn't love MoS, but I feel that most of my issues with it stemmed from the writing. Hopefully Terrio can do better than Goyer (I think he can). I'm also not convinced that Jesse is the right pick for Lex and I'm also concerned about Gal Gadot's acting ability. Hoping for the best.