Dear Jan,
If I read in the description "The best airliner for X-Plane! Extremely detailed 3D cockpit, 3D sound engine, accurately programmed systems and displays" I expect that the above mentioned things are working perfectly, especially in a pay software! I suppose you know that, for example, without a correct fuel prediction we can't plan an accurate approach. This is a basic feature at this level such as the holding page. Another issue, for me, is the VNAV! It is unthinkable that, having reached the TOD, the plane will drop to -4000/3000 fpm for the whole descent (it is assumed that I know how to program the fmc ) In my opionion, the fmc still does not compute the correct profile. So, I think the two urgent fixes are:
VNAV behaviur and drag
fuel prediction in progress and cruise page;
Then, the other things, are details wich can pass!
Thank you for your precious attention and have good work!