Diving Duck
I see that you are a pilot flying abroad. Have you ever asked the locals if they understand your 'Oz' accent?
I am a Scot flying in Oz and at times I find the Australian accent very difficult to understand. I hear a lot of Japanese accents here and because they are sticking to Standard Phraseology they are often easier to comprehend.
I think the answer is, yes we must stick to the standard terms but also a bit of understanding is needed from everybody in remembering that no matter where you come from you probably do not speak perfect English.
Know whit a meen man...
Cheers Ice