Masood has no utility where the ball moving even an inch , so yes masood should not be opening.
Ideally pakistan should invest in an all rounder like yamin and not another batsman. Azhar should be back to opening position ,and salahuddin should replace asad. Thats for the next series , in this series we should play salahuddin in the next match ahead of asad , it would be interesting to see if salahuddin has reduced the gao between bat and pad.