If Mundy was somehow impeding the development of young onballers at Fremantle then I suppose you could try and make a case for not giving him another contract. But, really, looking at it objectively our young onballers have probably had more game time than anyone could have predicted this year. And covid has also allowed this to be a fortunately timed development season, playing Fyfe forward etc.
He deserves at least another season, but footy clubs are often staffed by idiots so who knows.