Well, I've been making my own missions for training purposes, so the more static objects there are, the happier I am.
In my training missions I've created really detailed aerodromes with all kinds of things happening on them. It would be nice to have more tools to play with in order to expand this. (It's like having a bigger box of Lego.)
If only I could become "a modding guru" like you say! Alas, I do not have those skills.
Of course, ideally all of this stuff would happen in Career Mode, but, as you say, this isn't currently possible. There must be a point in the future (hopefully, near) when 777 either release a SDK or else open the game up for modding purposes. It might not be until it is absolutely financially unviable to keep the online authentication servers up, but how much longer could that be? Five years? Ten years? That seems unlikely. (But who knows? They may never want to release the game.)
It would be fantastic beyond all dreams if the modding community could expand Rise of Flight's Career Mode in the mold of Wings over Flanders Fields. This, of course, is currently impossible.
I can dream, though. No one can stop me from dreaming.