Hi LHR_EGLL_Aviation,
I am not from Laminar Research; just a flight simmer.
Some time back there was an offficial answer given by Laminar Research (jroberts) to a very similar question asked in this forum.
Without me going back through all of the questions to find it, as a reference for you, I remember the answer was in the order of "Laminar Research has a higher priority in developing the X-Plane software rather than developing aircraft to suit the users of X-Plane"
Good luck in finding an alternative developer.
Glenn