You are really underestimating just how much Paul loathes Alaster. I think we would've gone north to party in Eidulb if you'd left literally anyone else in power.
Alaster was the inital reason given for withdrawing from the Theocracies. We used his appointment to help pitch the idea of becoming a monarchy.
There were other reasons of course, but making Alaster ruler of Terran was the straw that broke the camel's back. Then there was his indivual threats against Niselurain nobles from Alaster.
