At the end of the day you are pretty limited to what you can do with Stereo RealDrums, there should be option to generate intros, different endings and fills etc.. there is no button to "Cut Loose" and generate a great drum solo and not be restricted as if playing in a church.
I think soon you will see Super RealDrums that will be Multichannel, do all of this and have a lot more variation to choose from.
They will still of course have Stereo RealDrums for those who don't need or want to venture any further, just as you still have a choice of Midi Drums over RealDrums.

With just this you are limited, don't get me wrong they are great but not the end of the story.