It would be great to be able to map the AUv3 Master effects. Most AUv3 plugins expose the midi parameters, so it should not be a problem to have a section in midi mapping for that.
And please make Djay remember the AUv3 used and load it automatically.
Also, it would be amazing if Djay could autogenerate a Midi clock from audio that is playing, so that even with manual sync (besides Ableton Link) there could be a clock sent to the master effect section (and possibly also to a midi out over USB).
Loading multiple AUv3 Plugins would also be amazing. By adding this, I could see the Djay software evolve even more into a mix of DJing and live act.