Casters have lots of AoE spells.

Arties have exploding canon shots.

Warlocks have aura (body odor)

Melee have (had?) cleaves.

Ranged have (had?) IPS. But IPS is bad because of multiple missile mechanics. (Actually, because of abandoning physics in calculating damage. No way shooting through a kobold does not reduce the damage to the kobold behind him.) So, take a hint from the alchemist and have exploding missiles. Single shot (no repeater, no Many Shot) arrows and bolts that explode with elemental or poison area damage. Logic is there in new class...