In our part of the world we say,
"Turn left/right heading XXX" or "Fly heading XXX"
- by saying heading you are inferring degrees, are you not?
As for millibars, well its hectopascals in Oz, and when you say,
" Descend 9000 feet, QNH 1020" why would you need to say millibars or hectopascals?
Seems like you guys may be using too many words. Isn't R/T meant to be concise and clear?
DP