So in my last game in LH (awesome game btw), the number one (and only) reason for me reloading stuff, is Yithril (why only Yithril?) instarazing high level cities while I don't notice them creeping up on me. And yes I don't care when the cities razed are at lvl 1 or below, but instarazing lvl 3+ cities? That really should take more time. The "alert" thingie isn't working cause of caravans all over the place, so some work at this could help, if this is by design.
Any other things that infuriates you and makes you reload?