I propose instead of the Air Atronach, a skill that produces an immobile Atro that as discussed by a few members of the community wouldn't feel right to highly mobile stam sorc play style we alter Overload's second morph as such.
Energy Overload (Current morph of Overload):
Charge your fists with the power of the storm. Light attacks become lighting bolts, dealing 1512 Shock Damage, and heavy attacks blast enemies in target area for 596 Shock Damage.
Each attacks deal 3% additional damage and restores 1102 Magicka
Attacks deplete Ultimate until you run out or the ability is toggled off.
Shattering Overload (Proposed Morph)
Charge your fists with the power of the storm. Shatter the ground beneath your feet dealing x physical damage to any enemy within 6 meters and additional x physical damage over 5 seconds.
I.e. A slightly stronger version of dawnbreaker without a stun in a circular AOE. This will maintain a faster play style that encourages counterplay of avoiding the AOE afterwards. I'm thinking your guy kinda hops then slams the ground with both hands for the animation. This allows for the AOE to appear for a second to allow dodge roll as well. Then rocks shoot out of the ground charged with lightning.