They have quite a few posts that are primarily about design philosophy. It’s clear they put a lot of time and effort into it. One of my favorites that has driven a lot of innovation in you can interact with the game is

zero-k.info/…/3_-_Fight_your_opponent,_not_the_UI

One that I find myself coming to a sort of grudging agreement with is (veterancy for units isn’t good):

zero-k.info/…/15_-_Experiences_With_Veterancy