Audio of what?
The Penalty? The only relavant audio is Keanes teammates muttering under their breath 'oh ffs, he's done it again.' it was blatant. Why the ref didn't give it right away simply shows how incompetent he was throughout.
Theres no audio for Konate, it was a yellow for a cynical foul. Sadly, in its current guise VAR can't suggest a yellow if the ref doesn't have the balls.
Yeah, the club should be on to Howard Webb asking for an explanation, and they need to raise the subject at every opportunity in the days ahead. I'd even go so far as to request Pawson never referees an Everton game again and provide historical evidence why.
Will they? Probably not. As you say, useless.