I don't think it will be a let down. There are things that aren't listed in the moves list, and such, that you can do. Like transitioning from rubber guard to top side control, then taking the back, RNC....
There are three/four videos up now, but still processing.
The officially released demo isn't out yet. Just a ripped version. They might have been handing them out, and that's where the rip came from though. XBL/PSN isn't out until tomorrow though.