Talk about limitations!
Try making great music the day you get your MS...

Now that's a REAL limitation

I don't know about Dom's playing skills, but first of all, assuming an arranger is a glorified karaoke machine might point towards HIS experience on them! The arranger only plays as much (or as little) as you want it to. But what you DO have the arranger play (presumably, you actually NEED this, or you might as well get a WS) needs to be convincing, needs to groove, needs to inspire you. And, let's face it, were all the MS owners out there as inspired as the owners of a T3, there WOULD be a deep pool of great user music.
And, as we can tell from the MS factory demos, so far, Dom hasn't even found ONE person that 'gets' his vision of the ideal user... The factory demos don't show totally original music at it's best. If his own demonstrators can't come up with this, how is he supposed to expect that, in OUR hands, it is going to sound amazing?
Simple question... Dom, did you EVER used to be an arranger player? I have my doubts.