3 numbers as bot said is way to confusing
say youre a noob
you open nalicity, see a number and within 0.1 sec you must understand whats the deal with the map, without first having to read some faq on how to read it
people leave then
the names really are overly complicated too, and certainly for non native english speakers, cast wtf, awe wtf, only build is more or less understandable
i still have no utter idea whats the real meaning behind the word "awe", i know its suppose to represent visuals on nc, but further then that i have no idea what kind of word it actualy is
when i review ironblayde i play map and i just come up with a number, it pops up in my mind in big giant flashying red neon light, 6 6 6 6 6 6, so i give map a 6 and then go see "how can i divide this 6 so it fits the awe cast and build score, oh lets do 1 for that, 2 for this, and then we have erm, 3 left so lets score other one 3"
that doesnt work
you feel what quality a map is like, you dont start ut and say "oh awesome this is a 2/3 build map and a 1.5/3 awe map", no you feel the general score
anything else is not natural
when this system was chosen there was a discussion about pleasing 2 groups of people, on 1 hand the group who like everything in numbers and very precise, and on other hand the people who want to know if a map is good or not but dont care at all about numbers, the group who wants a happy smiley face and a 2 line conclusion saying what the map is like
a single number review is the middle of these 2 groups, it is rightly in between the 2 opposites and has an element of both sides