Level 1
[Trait] Smart Servos
Increases Siege Mode's transformation speed by 100%.
[Basic Attack] Gyroscopic Stabilizers
Sgt. Hammer can now make Basic Attacks while moving.
[Q] Mine Spitter
Casting Spider Mines now places only one Spider Mine at a time.
Spider Mines now has 5 charges with a 0.5 second cooldown between uses and costs 15 mana. All charges are restored by the cooldown.
[W] Barricade
Concussive Blast creates unpassable terrain in front of Sgt. Hammer for 4 seconds.
Concussive Blast can be reactivated after 1 second to remove the Barricade.
Level 4
[Trait/Basic Attack 2] Ambush Protocol
Sgt. Hammer gains Stealth when entering Siege Mode or after not attacking or taking damage for 3 seconds while in Siege Mode. Leaving Siege Mode breaks Stealth.
While Ambush Protocol is active, Sgt. Hammer's next Basic Attack within 1 second of losing Stealth deals 50% additional damage.
[Basic Attack] Maelstrom Rounds
All Basic Attacks ignore enemy Armor and reduce the primary target's Armor by 3, up to 15, for 2.5 seconds.
Reduces Siege Mode's Basic Attack splash radius to 2 and splash damage to 50%.
[Basic Attack 2] Artillery Suppression
Basic Attacks in Siege Mode reduce enemy Heroes' damage by 10%, up to 40%, for 3 seconds.
[Basic Attack 2] Shrapnel Shells
Siege Mode's Basic Attack splash radius is increased to 3 and its splash damage is increased to 75%.
Level 7
[Trait] Entrenched
While in Siege Mode, Sgt. Hammer becomes Anchored, rendering her immune to Displacement and accompanying effects.
While in Siege Mode, Basic Attacks grant Sgt. Hammer 5 Armor, up to 25, until she leaves Siege Mode.
[Basic Attack] Endless Siege
Basic Attacks in Tank Mode heal for 20% of all damage they deal.
Basic Attacks in Siege Mode heal for 10% of all damage they deal.
[W] Hold Your Ground
Increases Concussive Blast's arc to 60
Murder everything at long range.
I honestly wish I could upvote this more than once and I genuinely hope that the HOTS team takes a look at this and takes notes. Brilliant work!