Here is an initial thought about stat lines for Khrave:

Innocent WS:3 BS:2 S:3 T:3 I: 4 Ld:6 Sv: 5+
Awakened WS: 4 BS:3 S:4 T:3 I:4 Ld: 7 Sv: 4+
Ascendant WS:4 BS:4 S:5 T:4 I:4 Ld:8 Sv:3+
Exalted WS:5 BS:4 S:6 T:5 I:4 Ld:9 Sv: 2+

I’m thinking that you will be able to choose between two different types of squad leaders. One choice will give you the physically larger and more powerful pack alpha and the other will give you an actual soldier that boosts the squad’s leadership by 2, be the cheaper option, but possibly with more wargear options due to being in the military. The only exception would be with Innocent packs as the Matriarchs would be awakened and give the pack LD:8.
Bleeder Pistols and Rifles, the current operating name for the Khrave’s base weapon, will have the normal 12” Pistol or 24” Rapid Fire range. The Weapon Str would be between 3 or 4 and the AP value would be none to 5. I don’t want another Str 4 AP5 gun though.

One option I’m thinking of, at least for squads comprised mostly of Awakened Khrave would be to have heavy weapons restricted to the Ascendants. You’d still be able to take special weapons.