I like the set buildings. They are like having one big building that you can kind of manipulate to fit in better. In addition, if you have the whole day set it produces quite a lot of goods. In my city I could, if I wanted to, replace my 3 steel manufactories with the day set and end up producing _more_ steel than I already am (bearing in mind that I trade for my non-boosted goods). I would also be up 1500 population and 600 culture, which I could spend on my highest tier manufactories.
From a game design perspective, constraints are interesting. It is also inconvenient and aggressive to insist that some buildings need to be connected to roads, and that roads be connected to the main hall. If we removed that rule then all cities would be inconsistent ugly blobs. Constraints mean we have to think about how to structure our cities to be most efficient (and, optionally, most elegant).
Here's my city:
http://www.elvenarchitect.com/city/planner/d8595cb9c43242659f8ef7d9ba1ffb14/
Notice the L shape, with the corners being hubs for sets (the top left is my woodelvenstock set, and the top right is my harvest set). Because the shape of my city is a big line, I only need 1 road. It starts at my main hall in the bottom left, and then wraps all the way around. I hang buildings off of it, and behind those buildings I put culture. I'm currently working on a little spot in the elbow where guest races will live, so that they don't crowd the streets (at the moment a huge number of my street segments are useless because of the dwarves).
Constraints are beautiful! This is my opinion.
@jps54 yeah if culture is what you want, then this set is maybe not the best. Were there any buildings in this event that were good for you?