Adding my voice to the chorus unhappy with:
1) All the buildings now look the same as each other
2) The drab colors
3) The main building moving (not cool)
4) The main building not being replacable
Previously, the buildings had a charming quality to them. Now it's all drab and cold.
Also, the graphics are messed up depending on your zoom size. At 90%, 100%, and 110% in Firefox I get lines in building dialogs (and also the "add a new building" dialog) that look like this:
My preferred zoom size in Firefox is 100% (my Windows 10 is set to 125% DPI) so removing the lines by zooming down to 80% is way too small and up to 120% is way too big. It's usable at 100% but it really drives home the point that this update wasn't vetted properly.