Adopt the UK/EU method
The Europe UK method of reporting a climb or descent gets my vote too....it is simple clear and provides a suitable subtle reminder to double check your Altimeter setting.
I also like that they also set QNH/Standard when cleared to altitudes/levels below or above the TL.
Lets get rid of the "to/two" confusion and dump it and while we are at it lose the "feet" in reports as well.
ATC - "Descend or climb altitude x thousand/flight level xx"
Pilot - "Climbing/Descending altitude x thousand/flight level xx"
Geez, couldn't be simpler or clearer than that CASA - Airservices!