I've moved on to the Economics window. First difference is a long requested feature. Populations are now named separately to system bodies, so you can have several pops with different names on the same planet. Pop names will default to the system body name unless specifically changed by the player.
There is an option to show system body names in the population tree, although to make the display cleaner the system body name will only be shown alongside the pop name if they are different. Also, species names will only be shown next to pops if they are different than the default species for that race.