Dedicated servers would be my ultimate dream for halo but as for the Arena system, i think it was as big a failure if not bigger. The division system was even easier to cheat than the 1-50 system used in halo 3 and didnt really show true indication of skill in my opinion. The Halo 3 ranking system before all the boosting and deranking started was good, it just needed a little more work to get right.