In general , i am of the opinion that English should not be used as a so called common language for ATC exchange, as it creates -and will always creates- a distortion between those who get it as a native language and....the majority represented by rest of the world!. A common LEARNED language like Esperanto will put all actors at the same level of humbleness ...not sure that this last word is understood by native speakers!
No. Everyone should do like scientists, and switch to Latin! Since it's a dead language and never changes! Very telling, that you brought up Esperanto. It was a language concocted back when the Sun never set on the British Empire, to cut down on the "arrogance of the British", since their language was spoken in many parts of the world, so, this means the real problem many have with this issue, isn't so much the differences within the English language, but that your "self esteem" is hurt, because your language is not the standard. Your melancholy selves would rather everyone be dragged down to your level of misery, than accepting and improving the way things are. Some language had to become the standard. A few slight changes in history, and it could have easily been French, Spanish, Portuguese, or some other language.