Honestly, one other thing that I would love them to bring back is the detail of the unit damage amount to various things (Infantry, Light Armor, Heavy Armor, and Buildings) along with the kill count of such things.
It is really helpful for newer players or players coming back to the game after a long extended break (in the event of a balance patch) where they can easily see in game what units are good at dealing damage to other various units.
For instance, you can see what I am talking about in this screen shot underneath the thumbnail of the Tiger Tank.