I like that. It certainly explains why the victorius traitor legions don't make the most of their initiative and why the traitors set up petty empires.
I personally like the idea of guys like Anshul flat out abandoning the plan in order to try and sway former allies. I'm thinking of Anshul dogging Xun all the way from Cadia and the two having a duel on Prospero after which Anshul decides not to crush the legion and despoil what will become the Jade Empire because he believes that Xun will accept his position.
Similarly, Gengrat goes off the rails trying to win over Saul. In his case, it kind of works out in the heretics favor, but not as Gengrat intended.
Meanwhile other legions just go nuts and let their vendettas drive them.
So at Terra, the Warmaster has his own legion, the Judgement Bringers, and presumably a few others.
Kashaln, Balthasar, and Aodhan prove difficult to control. Anshul is more interested in debating with Xun than burning worlds, but does manage to get his ass back in time for the final siege to summon daemons.
Gengrat is busy messing with Saul.
Meanwhile, the Iron Hearts are on a rampage, but are in it for themselves.
Maybe he also has a sizable contingent of Asura on Terra to fight the bio-engines of the Oathsworn.
Also I can see a lot of Silver Spears and Negators on board for the fight against Luna. There's also probably some loyalists on Terra being tasked with the assault, but they don't survive the campaign.
Meanwhile in all of this, Oramar and his boys are popping out of nowhere, sometimes with Harlequins in tow, and wrecking shit before vanishing.
As a result, the heresy takes a few years, but is relatively quick.
Basically:
>Luna Campaign
>Tournament
>Distraction actions and the red road to terra
>Three way war on Terra
>Siege of the Imperial Palace
>more red road and raids
>Siege of Terra