We fly 1500' circuits in the PC12.
Slightly wider spacing than one would be at 1000'.
Decelerate during downwind, start descent turning base, there is no need for "excessive" ROD from there.
And, without wishing to go down that old beaten path, one is well within gliding distance all the way around.
As many others have said, the most important thing is that everyone uses the radio properly, and has their transponder on.
The only worry then is those aircraft that have neither radio nor transponder!