Well, there was no marketing about helis anyway. If casual chit chat on Q&As and discussions on panels now institutes as marketing, then, they might as well not bother with any future marketing budgets. Additionally, those in the heli sim community were actually approached by asobo and MS for their input on putting helis into the sim.
There is also a difference here between “flight models” and the actual core physics that govern those flight model parameters drawn from config files. The core physics will have to be written independently from those that govern traditional flight, as well as tested etc.