Put the economic sliders on the main screen. I am always constantly adjusting my tax rate to ensure that I have 100% approval every turn as an example. Having the sliders on the main screen would save time from having to always click on the domestic window. In a long game this could save alot of time.
Also, if there was a way to automatically adjust tax to match a desired approval rating, that would be awesome. For example, I could specifiy that I always want average approval to be 100%. Every single turn, the game would automatically adjust the tax slider to be at the max it can be to give you an average approval of 100%. This would save copious amounts of time in the game.