I wouldn't replace Mick, I'd wait till the end of the season and not renew his contract, and make a clean break from there.
My reasoning is replacing a coach mid-season gives underperforming players an 'alibi' and they may 'downhill ski' into staying onto the list another year.
If the players don't like Mick fine, that is no excuse for the disgusting stat of only 2 players with more than 2 tackles at 3/4 time yesterday.
I firmly believe Gibbs won't be at the club next year, and I honestly think its put up or shut up time for senior players who have been at this club for several years (Walker, Tuohy, Curnow, etc) to show if they have the right to stay at this club next year (Judd, Carrots, Warnock won't be here.
Those older players do not deserve to have the luxury of having a new coach save their bacon, there is plenty of time for the kids to get games, but the likes of Walker and 2E have to convince me by soldiering on under Mick for the rest of the season why we shouldn't trade them.
I know that won't be a popular view but i am thinking at least 10 - 12 list changes at season's end, and honeymoon caretaker coaching periods clouding objective (if hard) decisions on list management.