If you only see a few different things, I'm not sure what to say. There are a ton of very obvious changes in there. A lot more positions on the ground, a lot more attacks on the ground, the all new cage system, new take down methods/animations, new fighter stances, new fighter skill systems, apparently fighter skill level (like level 3 guillotine, etc), all new sway system, lessened strikes from out far, etc, etc.
So I'm not sure what you're talking about. Sure it looks very similar to 2009, and that's because it's the same engine, just with a lot of additions to it; and there are A LOT of additions.