I just got Quadropolis, and I'm confused by the Urbanist rule. The rule is that, when you take a tile, you place the Urbanist in the place where the tile used to be, and the player after you can't point an architect at the Urbanist.
This seems unnecessarily complicated. In practice we regularly forget to move the Urbanist. Also, people frequently seem to forget that they can't point an architect at the Urbanist -- I've caught a few people doing this, but I'm not sure how many have done it and not been noticed.
Here's the calculation I usually perform. I have three opponents, and clever placement of the Urbanist will inconvenience at most one of them. It probably won't inconvenience them very much, since they probably have two or three tiles they want, and multiple ways to get those tiles. If it does inconvenience them, at best I am kingmaking by hurting one opponent but not the other two. On the other hand, if I take a suboptimal tile in order to inconvenience one of my opponents, that could hurt me a lot!
Also, it takes me a lot of thinking to figure out which tiles are even good for me. If I also want to spend time evaluating my opponent's board state, that starts to get into analysis paralysis, and I want to respect the other players' time by not taking forever to evaluate something that's probably inconsequential.
Why was this rule added? If we ignore the rule, what mechanics in the game will break?
(I suspect the rule might be more important in a two-player game. I've been playing with four players.)