Unit selection is kind of strange.
If I click the archer icon at the top left, it selects all my archers and shows me how many there actually are at the bottom left. But if I click a specific one, i can't really tell if it was selected or not.
Also, most RTS games, if you double tap the number for a control group, it'll take you to where that group currently is on the map. I'd love to have that added.