If I recall correctly he disliked the "Team Evil" aspect of Empire. Very few people tried to play the political game, backstab, compete with other Sects, abuse power over lower ranks, etc.

Essentially if you looked at how Imperials worked together it was very similar to Fort, with complete trust and the full expectation teamwork and comradery.

I personally see much more internal dynamics in Village, Trib or Tree where you have different aligns clashing. A bunch of Power hungry evil dudes should be even worse.