The economy is the number one thing that needs to be fixed in my mind. That and ground combat animation. I am sorry but blinking flags don't count for better ground combat animation. We have awesome ship battles and we can design ships with parts that can rotate on 3 different axis at varied speeds which is beyond awesome and takes the customization of ships to new heights, yet we can't see insectoid thalins charging against power armored drengin shock troops? Blinking flags with machine gun noise? Can't we do any better?
Anyway, the economy needs to be fixed. You feel like a total idiot if you don't go 100% research or 100% factories which just seems silly. I am sure everyone who plays on suicidal or harder uses the all labs or all factories approach at least some of the time. When you go half and half on a planet, you get the quartering phenomenon because of the way the economic sliders work. Yes, it gives increased flexibility but at a terrible sacrifice of producing power and efficiency to go half and half between production and research on your planets. Of course another incentive to "cheat" by going all labs or all factories is you don't have to research an entire portion of the tech tree as well! Go, go, exploiting the game!!
Anyway, a very simple fix that can make this game less tedious is to put the tax percentage on the main screen so you don't have to open the trade screen every single fricken turn just to optimize a certain approval rating. For example, in the beginning of the game I like to go 100% approval so I can double pop growth. Heaven forbid if I accidently have 99% approval and 25% growth on a given turn!! So every turn, its open the trade screen, monkey with the tax slider, close trade screen, etc. Every single turn you have to do this to optimize. Yawn. Why not just have that one slider on the main screen kind of like civ 4 where you had the tech, trade, and luxury slider on the mian screen? That way you can save time by not opening and closing the trade screen every turn. Or, even better, have a feature where the game automatically adjusts the tax percentage every turn to match a desired approval rating tt you input. So, I just input "I desire 100% approval" and every turn the game does the instant monkeying with the tax percent. If it is impossible to make a given desired approval rating the game then warns you it can't do what you want.
This is a great game otherwise! Being able to rotate different parts on your newly designed ships is just bad ass!!