Mechanics review

[CecilOne]

Just some little things, base on ASA 2 umps; but add NFHS & NCAA if you like.

A) agree or disagree
BU in B slot, pop up to SS pretty deep, this is a time to ignore inside/outside to avoid throwing lane

B) agree or disagree
Assuming PU is covering 3rd even if first play if from the outfield; it is still from the outfield if a relay by SS

C) R1 going home, R2 to 3rd, other runner(s):
How do you as BU judge whether PU is needed at home or should cover 3rd?
Please say if Q too cryptic/simplistic (politely of course).