Yeah, I figured you wanted them to scale up to you, and I said it was already included.
Apparently though, you want them scaled down.
Personally (and I know it's a popular suggestion for Pillars of Eternity/Project Eternity) I prefer if all 4 party members have a slightly seperate XP value. That way instead of having 1 long wait before leveling and then having to spend a lot of stuff it's a more gradual progression; with less time between levels, and each level doesn't take you as long to spend stuff, and allow for a more gradual increase in power of your party rather than the massive boosts a level has currently, since all 4 suddenly increase in power.