I believe that XD3 should be treated diferent than XD9. As a module it should have something more than a keyboard! What I wont to suggest is some optional plugins that will make XD3 perfect.
1- Basic sequencer like the one that Roland G1000 has.
2 - General EQ, like the one that Yam 9000Pro has.
3 - Compressor and three band EQ for the mics.
I will be happy to spend extra money for such upgrade.
Of course are many things to be fixed at the 2.0A version, but let's hope for a brighter future!