Biggest problem I have with league here is the ability of players to openly negotiate their contracts whilst they are playing for a club, and possibly have to play against a team they are transferring to.
The Sharks, my local side, have lost Jack Bird to the broncos, and we're only 5 games into the season! That's what the rules, and the salary cap allow and do.
There's also talk of a draft system to stop these early negotiations. Giving first dibs to those teams that finish bottom or near bottom of the comp.
One thing you might not know about the NRL is that only two teams own their own ground, Penrith and The Sharks. All the others are usually owned by the local council and leased to the RL club (but other sports can use them outside the needs of the RL club.