Really looking forward to this. Just started making the switch to Prepar3D and so far I'm very happy with what they have to offer. The only issue is the lack of airliners. I'm having to use FSX for Airline Flights and Prepar3D for general aviation.
Keep up the good work and hopefully soon we can fly these great planes in a newly designed environment.
I have this same issue with the 738 and it all started after installing an FSDreamTeam scenery. It added something somewhere which i'm trying to find and see if that's what's cousing it. Something to do with HD.