Lol,

Seriously though, what would put the Audya way over the top
Is

Being able to create and load your own Audio Guitars and Audio Bass exactly as you can do with the Drums.
And then of course the "guitar" could be anything such as arpeggios , REAL choirs. Your own pads from Omnisphere VST and such.

The sky would be the limit

That' would put the nail in the coffin on all other arrangers