They won't make you PLAY better... but they'll sure make you SOUND better, or at least not as repetitive, and that might help you fight your own staleness.

I mean, let's face it. If new styles were widely available, and at least as good as your current ROM styles (they don't HAVE to be as good as the next generation model - as good as your CURRENT ROM styles is pretty damn good), most of the 'old model fatigue' would disappear. And sounding fresh is probably the main reason any of the 'every new model' upgraders buy each new model. IMO, the style itself, FAR more than any new lead sound or minor OS improvement, is the majority contributing factor to a sense of improvement when we hear these new models.

Be honest, if ONLY new lead sounds and a few OS changes came out on a new model, who would buy it? But a slew of new, well produced styles, and we are like kids in a candy store!
_________________________
An arranger is just a tool. What matters is what you build with it..!