The biggest issue is that AFL is like no other sport with interchanges, no other game has 80 interchanges happening as quickly and as often as AFL does.
The NHL (Ice Hockey) does with their Line Changes system with offensive and defensive lines changing very often (sometimes players are on the ice for less than 45 seconds). The sports science behind the constant line changes in the NHL is one of the reasons we have so many interchanges in the AFL today.
EA's NHL 10' does well to manage Line Changes but it works easier as the "Lines" are always pre-defined and grouped.





