Chris,
since you work for GM I am taking advantage of this occasion to vent my main complaint about (all) arrangers:
no matter which style you choose, after a while it becomes a cliché, because each time you press the start, fill or end button you know in advance what to expect. I wish that arranger programmers could add a lot of variations, i.e. at least 6 different fills for each style (they last just 1 bar so don't take much memory), and every time you press "Fill" one of them comes up in a random way (just like a real drummer does) and the same could apply to the "intro" or "ending" parts. I am not talking about huge differences, but something than can surprise you each time a little.
Maybe you could choose the degree of variation to expect (let's say from 0 to 5) and so every time you start a song you could choose to play exactly what is in your mind or let you little band take you aback.