There's no way you could "balance" a level 80 toolkit for sub level 50 play. Look at DRG, no AoE until level 40+. Bringing a 80DRG into Sastasha and suddenly they have 3 hit aoe combo, Dragonfire Dive, Nastrond, Stardiver etc. Even if these were 10 potency it's infinitely more AoE DPS than a DRG at level 16 has.