Queues are too long period. This is a huge turn off for new players. Especially watching tons of new players running around under a free trial period.
1. The roulette system does not support all instance.
2. The roulette system does not off sufficient rewards for players to continuously push players into lower level instances.
A high reward full random roulette attached to every instance in the game would do the trick. Obviously the fill priority should be for the longest running queue.
I've seen too many queues go over an hour... I can't imagine any players experiencing this game for the first time would find that even remotely acceptable.