Grand plaza are very pretty and give a nice boost to desirability. But they are just a large stone wasteland where nothing happens except for villagers standing and staring at nothing. It would be nice if there were occasional random “events” happening on them that last a maybe a month or so. They don’t affect gameplay at all, just something interesting and fun to look at. Examples might be…
A pop-up market of small stalls/tents with people browsing
A crowd of villagers listening to an orator
Small groups of villagers socializing
Villagers circled around a show watching musicians, jesters, or acrobats
A little fair with booths, spinning rides, and skill games like an archery range, skittles, or ring toss
I realize this is going to be a low priority item compared to the other upgrades that need to be done, but perhaps it can be filed away for future consideration.