eh, I personally like the idea of random events that help lvl people up.
Hmmm... I get what you mean, but a lot of people don't like random elements. As it is, a lot of people claim for cheats, despite the fact that the game doesn't require a lot of grinding imo.
You do need to level them up to start a series of events in order to unlock the scene, although far simpler than the main gems (I did it this way by design). The quests would get more complex as it goes on, though, for example, I do have a whole sequence planned for Sadie and the island.
Thanks for your input, mate.