The Legion should be the first AI killer if they got fully reworked

Yeah, Legion was horribly designed. They're not a legion, they're solo killers. LOL what was the point? When their power is just generic "Run fast, stabby stabby" it was a huge let down. I'm not saying their power isn't fun, I'm saying it does not suit them at all.

LEGION should operate more like the twins, but without switching control. You choose which Legion member you want to play as pre-game with customization. This is the "Leader", and they can call on their friends to assist them.

Feral Frenzy remains the same, but Legion's movement speed is reduced to 110% again. Alternatively, remove Feral Frenzy entirely but Keep Legion's speed at 115%. You have a second ability with a long cooldown that calls on Members of the Legion to assist you:

* While targeting a Survivor with Deep Wounds, can call on a random member of the Legion to harass deeply wounded Survivors. They'll spawn at an random interval between 1-10 seconds after the Survivor begins to Mend/Repair/Heal/Cleanse/Search. This Legion member moves at 105% speed towards their target (They'd have to program some AI) and lasts for a short duration before disappearing, and does not have a Terror Radius.

(This will only down a survivor if they are not paying attention, due to this AI Legion not having a Terror Radius. If they are, it shouldn't be too difficult to run away or loop them until they expire. In the end, it will waste a single Survivor's time about as much as Mending would, it's just more active.)

* While targeting a Survivor in the Dying State, you call on a random member of the Legion to pick them up and transport them to the nearest hook. This Legion member can be blinded easily, as they do not look away. They will swing at any Survivor in their direct path, but will not chase outside of the most direct path to their intended hook. If they drop the Survivor for any reason, they despawn.

(This allows Legion to keep pressure up, but also sets Survivors up for easy counterplay with Flashlights and pallets, as the AI legion will not play around these. Still, being able to get AI Legions to assist with hooking survivors allows the main Legion to apply pressure elsewhere, or even escort their AI to the hook.)

* While targeting nothing, call on a random member of the Legion to stand guard there. They will spawn after a visible short delay, and stand in place for a short duration. Any Survivor that comes near will be marked by Killer's Instinct for a short duration, after which the Legion member will despawn. This Legion member will attack any Survivor that comes nearby, but they will not move from their set location. Stunning, blinding, or being hit by this Legion will cause it to despawn. Automatically expires if they are within 16 meters of a Hooked Survivor.

(Probably most useful for winning loops, by placing them in a location where they will block a Survivor's movement, or force them to take an inefficient path and not make the loop in time. Can also be used to temporarily (unlike Victor's permanently) guard important locations like Totems, Gens, and Pallets.)

I like your approach. Definitely some changes and additions I'd like made to it, but great template in my opinion. You would have to figure out how to get it to work with all the different inputs needed. Being able to activate Frenzy, using specific Legion members, and telling them all what to do.

The thing about re-working killers is that you kind of ruin the game for people who already liked their power. I don't think legion needs a full re-work but more of just a few number tweaks and deep wound being buffed to be more scary.