Agree that Knights is an obvious out & the best 'in' would be Lids - if possible. If not Lids, then Lennon would be up for a game. There wont be many changes after a big win so don't expect 6-8 changes.
A less obvious change is to our mentality! Melbourne like to get every player within 50mtrs of the ball, drawing their opponents in with them & reducing the game to a scrappy all-in brawl. We have to be ready for a man-on-man slog with little space around the ball & the Bulldogs game showed we don't cope well with that style. We need to find a love for congested footy that we haven't really shown yet, Brisbane did nothing to clog us up but Melbourne will be completely different. Our numbers for contested possessions have been pretty reasonable so far, we are capable of slogging it out man-on-man & winning contests, but other than the Bulldogs no other side has committed to the mob mentality that Roos coached sides employ as a default clause. This shouldn't come as a surprise to us, all we need to do is to expect it & be ready for it!
The Ant Hill Mob style of footy is a shocking style but Roos loves it & has made a coaching career out of being utterly negative, its the cheapest way to get competitive games out of a third rate bunch of hacks, so we need to be ready for it. There will be plenty of space to run & spread into if we go long by foot & get it outside of their defensive bubble.
