I feel like a lot of potential is wasted for PC players by leaving the keyboard mostly without any purpose during ongoing sessions. You have to jump between all the options with your mouse.
Just a simple thing like being able to speed up or slow down the time via keyboard would be great. Maybe switching to the strategy or timing screen via another hotkey? Changing camera views?
I know it's already possible to navigate the menus using the arrow keys or WASD but it's not very intuitive. Having dedicated buttons for different actions would be so much better.