Important QoL, penetration clarity.
When you hover over your armor/magic resist stat, what does it show you? Right, "You take X reduced damage" Now, when you do the same, but for enemies, looking up their resists, it should show you some additional info: "Their current resists + resists they would have based on your flat and % penetration + the reduced damage they take considering your penetration. Preferably in some distinct color, yellow for example." . . . . . . . . . . . . that or everyone should memorize the formula and do the calculations in their heads. but that won't happen.
approves.