Most building look very similar, and finding one after it has been built can be challenging. Personally, I’d love to link to a building type directly from the Settlement Items by linking from the Produced By picture. Not very intuitive, and maybe you have a better idea.
Also, most buildings look way too similar in the build menu. I would love to see all building follow the model of the mines and have a little picture of what they produce. for example, cobbler has a little shoe in the icon.