I have difficulty to believe in someone that got invested with supreme power, made his best to get rid of hiw old rival, and then suddenly giving up on all that power... Out of what ? Idealism ?
Okay... Why not, but I got to admit that it's not very... easy to find in all of RL History.
Ah, perhaps maybe... I certainly haven't heard of all the leaders of all times either...
I'm rather fine with where they are now with the Minmatar government structure in any case.
I also rather liked what Khanid brought to the lore back in time... It was not total heresy, it was not orthodoxy either, but at first it sure looked like it... Until political realities turned it into some kind of awkward far fetched heterodoxy making conservatives grit their teeth, with a state of cold war between the two...
It really was about how far was the empire willing to go towards heresies and most importantly here since it's all about politics, where the heirs and lords were willing to go to punish a rebellious lord.