I, and most of my players, have always been pro Dulinor.
Lucan was unredeemable.
Margaret was, to say the least, too humanocentric and cyber-paranoid as presented.
Craig was, well, petulant, and seized power he should not have, possibly reasserting power he once had legitimately held, then going far beyond.
Norris wasn't vying for the throne; he just wanted a clear choice for whom to follow, and to protect his people from the war.
Brzrk could never overcome the stigma of being a vargr in the moot. His kids might have been able to.
The Confed simply wants to destroy the imperium, or at least, recover their old turf.
Vland was in clear violation of the imperial government, and were protecting norris from being part.
Strephon, real or not, was declared dead by the moot. Too bad they didn't declare an emperor. THat there was a palace coup is proof enough alone he did not belong as emperor.
This leaves Dulinor. He's got a valid claim, weak though it be, and is a populist. Traits my players admired. He was the epitome of "Government of Men, not Laws"... and this, too appealed to my players.