Since my eyes aren't getting any better, I'm wondering if it wouldn't help if you could assign colors to the slots in performance mode.
e.g.
Slot 1 = green LCD display color
Slot 2 = blue LCD display color
Slot 3 = yellow LCD display color
Slot 4 = red LCD display color
Solt 5 = grey LCD display color
You can change the color of the display globally (system settings on page 3), so it should be technically possible or what do you think about it?