I was coming to this forum to propose the exact same thing.
A pick is a situation that is advantageous for the offensive player, and it should not be possible to use the pick-call to gain a second advantage if the outcome of the play is finally at his disadvantage, whatever if the call happened before the pass (which is frequently very hard to judge).
The play should stop only when the thrower acknowledges a call was made.
In this way :
– It’s the thrower responsibility to avoid throwing when a call was made
– It’s all other players responsibility to keep playing/running if the thrower has not acknowledged the call yet.
– It’s all other players responsibility to call, and repeat someone’s call, in an audible way for the thrower.
With the current rules, a pick called before the pass (eg during the thrower’s shot) always leads to weird misunderstanding situations and unfair outcome for the defense.