There are studies on the loss of quality of peripheral vision, when I see a replay sometimes I don’t use the caster mode and I pay attention to the global tail, which, by its icon colors, I can tell if it is producing a unit or a technology, so I fully agree with that classification, and with the direction that the game took with Eric Wrobel, this is based on studies on the Gestal, on how the brain optimizes things. What you are requesting is for simple nostalgia for your past games, not for efficiency, it is your right but that is the way things are.
I have reduced the image and it is easy to know that green is a technology and brown is a unit, with your colors you cannot easily distinguish them.