There are really quite a lot of functionalities of default planes not implemented. Like FMC of a320 are partially functioning, as well as the center monitor (screen of hydraulic system and others). Hope they can be implemented soon.
…like it is in all other simulators…
I doubt MS will get us study-level aircrafts.
That will be the job of 3rd party developers.
Yeah, Asobo gave us the foundation. Study level will come from others as it always have. Even if Asobo were to give us study level they will cost just as much to purchase as elsewhere. It is crazy to expect otherwise to anyone that has any clue about development and its costs at all.