well the fact that Lion'el was originally planned to be corrupted and one of the traitor primarchs but turned out to act in a neutral state is pretty cool and i seem to like the character of Lion'el Johnson even more now
I was wondering as Lion'el was strong enough to resist the influence of Chaos and the gods would not all the traitor primarchs have been strong enough to stay loyal (Such as Alpharius/Omegon who are hinted to be loyal but turn traitor under the persuasion that turning traitor would be for the greater good), so it seems that the Emperors actions are more significant reasons for primarchs turning traitor, for instance disgracing Lorgar by telling him he was wrong in having faith, by condeming Magnus wrong because of his warning, leaving the crusade and refusing to tell Horus of his future plans, so the Emperor's leave from the crusade and his and his lack of guidance for his sons could be a more significant reason for why the heresy happend, in my opinion
Im not sure if anybody else picked up on this, but i count that the visions of the pods falling sum up to 10, half the number of primarchs, so i wasnt sure whether these were the list of all the primarchs that turned traitor, hinting that the two missing primarchs did not turn traitor, or whether this was a list of the primarchs that were originally supposed to turn traitor..
also two last questions if someon could answer for me
im unsure of where alpharius/omegon landed, but it hints that it could be some kind of ship, if so how could they be corrupted by chaos
and second why did the chaos gods not attempt to corrupt all of the primarchs by sending them to chaos corrupted worlds or other situations...?