I have seen recommended briefing notes for instructors, they all mention slip then yaw as secondary effect of aileron, some barely mention adverse yaw...
Notes are crap.
It sounds like you have seen EXACTLY what happens and you are all over it.
FGD
There is no roll occurring during a level turn. The roll is at the initiation of the turn, but then ceases.
Correct!
For the remainder of the turn, the aircraft is in continuous yaw and continuous pitch.
NOT CORRECT!
Yaw is rotation around the normal axis. In a constant bank, the normal axis is tilted at a constant angle. The aircraft turns, yes, but if the aircraft was in fact in a yaw during a turn its nose would be increasingly below the horizon, as if the pilot had used (and held) too much rudder in the direction of turn.
