I don't think people give Yamaha credit for all of the new S.A. regular voices the T3 has over the T2.
If it were just the S.A.2 voices, and there are few of them, that wouldn't be a big deal, but there are several dozen new S.A. voices and new Mega!Voices and new drums.
Sure, The T3 would have been a complete coup if they had included a TC Helicon quality harmonizer.
An arranger module is an interesting idea, especially if you can assign buttons on your controller.
I still prefer one piece of equipment for an easy setup and take down - in my case, 10 minutes or less.
Beakybird