Overall I love the city management changes.  The associated UI detracts from otherwise excellent progress on this part of the game. 

1.  Double clicking in an area around the city automatically builds the alphabetically first item in the available build list even if you are not in the build list.  Double clicking while the city is selected should NEVER automatically build something.  Especially not something I haven't previously selected.  You can undo it easily enough, but it's just crappy UI behavior.

2.  I have yet to find a way to upgrade my shards that are within my city's borders.  I am unable to select the shard and hit upgrade and the upgrade does NOT appear in my available build list.  To be clear, I mean shards that are actually within the city walls, not shards within my territory. Those work fine.  

3.  It would make cities more interesting if I got a tooltip when I hovered over the individual improvements.  This would be especially helpful for new players or when new improvements are added to the game.  Right now, I don't recognize some improvements and I have to hunt through the city details screen to figure out what they are.  

4.  The train/build menu's should be less transparent.  Looking at the list of options to build/train is a bit painful since my empire tree shows through pretty clearly and makes the left edge of my screen a jumble of portraits.