An announcement regarding his departure came shortly after the final whistle.
Richards thinks that the contrast between Postecoglou's style of play and the team's previous approach was always going to be a factor in his success.
He also suggests that Postecoglou's media outbursts may have contributed to his departure.
Richards is now curious to see what direction the club will take next, and whether they will opt for a short-term or long-term manager.
He questions whether the team's ambitions were clear, and whether they aimed high enough in their search for a new manager.
Richards also wonders how Postecoglou could have changed the team's style of play in such a short space of time.
He notes that if Sean Dyche takes over, he will be working with a talented team and will have the opportunity to implement his own style of play.