Sounds in the game, discrepancies

[Freighter]

Why are footsteps so damned loud? I hear a tracer running on the other side of the map but this pharah that has a god damned jetpack on her back can get above me without enough sound to tell it apart from other things? I know tracer is coming because of her LOUD AS HELL FOOTSTEPS even from like the other side of the map but a jetpack doesn't make anywhere enough noise to be distinctly heard like tracer's footsteps? Why are the footsteps so loud or the jetpack so silent?

[Twen]

Little warning in the form of footsteps is good when your FoV is so limited; but why exactly are we not supposed to hear Pharah coming like the rest of them?