i think your burning questions are worth asking, especially the ones about the future of the product lineup and when the full speed miners will ship, etc.
it would be good to know when they are getting the new boards and which batch(es) will have them - e.g. will some february batches, or march batches?
Also, whether it would be possible for existing customers with 1.4Th rigs to upgrade to the 2Th - e.g. by mailing in the device - ideally crossmailing so no hash rate is lost. It seems like once they get the old rigs in they should be able to pretty easily upgrade them in house at little cost, as long as they can remove the chip and put it on the new boards...
Cheers,
Will