The ATC for sure is awful, its a direct paste from FSX but then they even removed useful bits.
It seems to think the whole world is north america when in reality its not.
Altimeter settings not QNH, not recognising the rest of the world has a different transition altitude,assuming the whole world has a clearance delivery/ground/tower setup and so on.
Its also very basic, often vectoring you or descending you very very very early. No proper top of descent planning or profiles, no clearly communicating SID/STARs, sequencing etc.
It clearly hasnt been addressed by anyone since FSX days and they clearly havent consulted with any pilot or controller outside N.America. This was one thing i REALLY hoped they’d improved but the current implementation is (i) annoying and (ii) not fit for purpose.
The one thing it DOES model 100% though is the complete and utter lack of ICAO annex 10 phraseology which is accepted as the international standard of what to say, how to say it and in what order which is roundly ignored inside the US to the point of being confusing and inconcise to just about every foreign pilot operating there!