I think lj has learned a lot this season. Whilst achieving 10 games unbeaten, he, by the time he'd found his system, had only the current players at his disposal. Next season he should know exactly what he wants.
Played both though considerably more league. I played scrum half at both codes. While being immensely involved at league, whilst it being a pivotable position in union I was often bored to tears. My only job in union was to pass the ball from ruck/scrum/lineout, nothing else.
Can I just take a moment to post a warning. Playing this game will seriously enhance the chances that you'll all become violent gun toting bank robbers. Coupled with car jackers and murderers.