Can we insert negative consequences for stacking jobs in FL?

[Mawlzy]

What all of those jobs have in common, and arguably why they're so often used for stacking in FLs, is that they all have powerful AOE burst damage, with the exception of SCH but they more than make up for it with insane sustained damage.

I think a better case could be made that AoE abilities need some kind of diminishing returns for Frontlines, because they just plain stack too well together and can lead to team wide wipes with only a handful of opposing players coordinating their AOE burst damage together.

Right, given the skills are allegedly balanced for CC, one might limit AoEs in FL to five nearest enemies.