I suppose I'd wait two weeks, just to see what the feature set of a 70D (if that's what's announced) looks like.
But as for, 'everyone is not really happy with 7D', sorry but that doesn't make sense. Well, it does in the sense that not everyone is ever happy with any particular product. People like to complain. But for bird photography, the 7D is one of the best cameras available, and it's the best
camera in it's price range. AFAIK, the only better options for shooting birds are a 1D-series body or a 5DIII, and in both cases you'd ideally want to pair such a body with a lens longer than 400mm.
I've got a set of bird shots on my Flickr
stream, and while a few of the recent ones are shot with a 1D X and 600/4L IS II, most of the images are from a 7D + 100-400L. For $2700, that's an excellent value and a kit that's ideal for bird photography.