Shift+Tab doesn’t solve anything. The issue is that we use colors to communicate with teammates (“Hey red” “Hey blue”), now with a bunch of nuanced colors, it’s borderline impossible to communicate (“Hey yellow, no wait, the lighter yellow, or is it brown? ya you”).
Reading the mini map is also more difficult, and when units are fighting it’s hard to distinguish enemies from your own (again, yellow and light yellow? look the same in close combat), makes it hard to micro.
Also, are you all 10 years old? Why do adults need every color in the rainbow to enjoy their game, it’s so ridiculous.