Sorry for the triple post but I have some Formation ideas to share that I think you'll like.
I want to look at the Infantry Company idea again, with the following changes:
Formation:
Imperial Shield Infantry Company:
1 CCS
1 Commissar
0-1 Ministorum Priest
3-6 Troop Choices
Restrictions:
The formation must include at least 2 infantry platoons.
The commissar and priest (if purchased) must be attached to a unit from within the formation.
Rules:
If the Company Commander is your Warlord, you may re-roll on IG warlord trait table.
Vox Casters for all units in the formation are free.
Combat Doctrines: Formation must choose one of the following doctrines:
Mechanized Infantry: All units in the formation that can take a chimera or taurox as a dedicated transport must do so. These units are free, but must still pay for any upgrades taken from the Vehicle Equipment list.
Grav-Chute Infantry: All units within the formation have the Deep Strike special rule. No unit within the formation may purchase a dedicated transport.
Line Infantry: All units within the formation have the Objective Secured special rule. I'll add more doctrines as they come to me. But how does this look so far? I was hoping that the large number of models needed (along with the points cost of this, 405pts minimum, and the loss of Objective Secured for the most part) would balance it out.