Poor kick to handball ratio and possibly below average kicking efficiency (cannot be determined until post game stats are released).
Wet weather footy likely to result in lower disposal efficiency, higher contested possessions and tackles in comparison to a normal game and thus more emphasis than usual in these categories for scaling,etc.
It's SC gold to be the loose in defense and also to take kick ins. These types get overscored alot for their actual impact on games but that's just the system.