@kurwa @Fleet Admiral Lee Hung
-Justice: Fujitora's priority has always been protecting the innocent. During Dressrosa he prioritized that over anything else.
First he sided with Doflamingo as he was sure once the Strawhats wreak havoc it will endanger civilian life. What made him change sides is when Doffy created the bird cage, there he had no choice but to bet on the Strawhats for the overall well being of the DR citizens.
Fujitora thinks that even with the current WG, innocent people of the world can still be protected and live decent lives. The reason he abolished the warlord system was not because he hated these pirates the way Akainu does
Fuji always had the common people's well being in his mind. It's what Smoker told him and what he witnessed in Dressrosa
-Loyalty to the WG: Fujitora is not an idiot, he understands the value and weight of his position, and he did remark to Doflamingo that his position as admiral will allow him to work on his goals. If he still wants to makes changes in the system and help purify the justice enacted by the WG, he has no choice but to keep his position. This was one of the dilemmas he face in Dressrosa, he could not lay a hand on Doflamingo because that would immediately lose him his position.
It's not like Issho was happy with the whole situation. He's simply helpless against a system that's larger than the world.
Fujitora is likely in favor of a WG system but s33ing how his justice is humane justice first and foremost he's definitely not on good terms with the celestial dragons. If he had the choice to clean them up from system I don't think he'd think twice.
However, that's not really a possible reality for a character in his position.