Thanks for the kind words!
Yes, 1.5 is the current version for XP12. We are planning to updated the aircraft further in the future and are very aware of it´s current shortcomings, especially in the FMS department. Unfortunately we can not provide a realistic timeline as to when the next update will drop, we have a history of lengthy dormant phases and then stretches of working hard on the aircraft - both Tom and me do this as a side project in our lives in addition to our "real" jobs and family, so don´t expect the same cadence of updates that you would get from a dev team that does this "full time".
As you said, the plane can be flown safely, realistically and (I think) with having a lot of fun with it - I flew the real aircraft for 10 years and regularly fly our model in it´s 1.5 status and still enjoy that immensely...despite the shortcomings. I know this may sound apologetic, but real pilots (at least the older ones) still pride themselves in their ability to calculate and execute descent planning better than the FMS can .
Cheers, Jan