Sadly I think Pro has reached the end of the line. It will not be improved and may not even continue to be sold IMO. We already know that Audyssey have effectively washed their hands of it by their decision not to fix known and acknowledged bugs in the software. Once a company acknowledges that their software is broken but says that it has no intention of fixing it, I think that sends a pretty clear message.
Refresh my memory, what other than the fact that the levels and distances of dual subs - which has been attributed to the licensees/manufacturers and therefore not anything that can be fixed - has been acknowledged (by Audyssey) and will not be fixed? IIRC, concurrently with the discovery of that bug, there was a data transfer bug (on Denon?) that they did fix.
Haven't many new receivers/processors have been introduced since then with Pro compatibility ... And subsequently the XT Pro software was updated to support?
Does the dual sub bug make the software "broken?"
Do you have any information suggesting the Pro Kit has reached the end of the line and may not continue to be sold?