I agree that the Colosseum made the quests better. I was able to get mythic girls only because of it. I think that was something that, if paired with a PM that didn't have those 'get this type of chest' quests, the game would have been in a place where it did not need too much change if any, and it would have been playable. The colosseum was definitely a great improvement. What I was referring to was the fact there was a time when there was no revival for monsters in the dungeon, so you had to hope for a chest with the type of girl the quest demanded, i.e. "Get 160 epic cards" was impossible because you couldn't fight the epic bosses in the dungeon to chip away at that quest. Now it is down to get 60 epic cards, and you can chip away at that quest by fighting monsters in the dungeon.