What makes you think it will change then?
It will not.
And it could just as well be;
Pilot "perfect english" (irrespective of nationality)
ATC "unintelligable"
Just a week or so ago an Etihad widebody declared Pan Pan in Saudi airspace with a failing engine. They were on the air route that goes up along the Iraqi border from UAE to Europe via Jordan, Syria, Lebanon, Turkey etc...multiple calls later the Jeddah ATC chappy finally came up in his version of english and started asking a bunch of stupid, barely intelligable questions..even other aircraft on frequency had tried to help getting the Pan call heard and then intervened to tell the ATC fella to shut up and let them get on with it. They diverted to Amman (Jordan) and landed safely, job well done, Saudi ATC were irrelevant to the outcome.
The very high standards of ATC in Australia, NZ, UK etc are not universal...and the barely intelligable cadets you hear about the place will be gracing a widebody cockpit soon.
There is no 'one standard' as ICAO would have you believe...ICAO is just a theory of what a perfect world might be like.