It is good that we have audio arranger. But if somebody says that will use audio arranger for playing chords with it is stupidity. VIRTUAL GUITARIST is working as different tool. Also that is possible to play audio but that is new story. I thing is better to use VST for this reason and all is prepared.
MS can now read all VST well. And this is next opportunity. To have inside all what you like. You need only to play midi and than you can use what you want.

But I see in AUDIO really great tool and that is editable that is one more great thing.