Yeah, the idea of it is attractive, and learning the crazy UI is half the fun, but once you really get into it you realize that there is no there there. It's nowhere near as complex as it seems, and full of bugs, some decades old. Trade is so easily exploited that there is nothing exciting about the elves coming. You can kill them and start a war, but the combat is so unbalanced and exploitable that they pose no threat. Trade being pointless makes half the items in the game worthless. I recently played until FPS death kicked in making it impossible to continue, and didn't feel engaged enough to start a new fort.
The problem is that the brothers do not play their own game, and it clearly shows.