I always ends bored with any game I play, at least for a while (and I will replay it several monthes later).

RTW, so far, has shown a tremendous and incredibly resilience to boredom, which is something to praise ^^

I agree, though, that the lack of non-conquest goals is somehow lacking. After a while, you start to "see through the game" and feel more the mechanics and less the ambiance. Some lively and varied goals/objectives/creations would definitely help to flesh even more the game, and improve it overall.