From what I've played it is really sweet.
It is not very different from 2010, so if you remember the modes and menus, it is basically the same.
The public looks more credible, way more credible, even if you can see the few peeps cloned over the place they are not a 2D carboard-like models anymore.
Another thing I liked about 2011 was the universe idea, now depending your battles it creates the calendar, and they offer you five stories, so you can play solo and have something to look at, before you make your own.