There's a Youtuber called Dan Gryder. Not everyone likes him but he's recently done some stuff on this subject. His big thing is instead of people just making announcements, even using Dave's examples above, ask questions of the other pilots i.e.
"blue biplane Charlie Delta, from yellow cub Charlie Delta are you about to turn final?"
"no, not yet, I see you at the hold, you've time to depart"
Check out his video flying a Cherokee, lots of good APQ stuff in it.
We talk to each other in the circuit quite a lot, like that. Dan's point is that asking questions greatly increases the chance of getting meaningful information, rather than just " blue biplane Charlie Delta downwind".
TOO