I also do this and try to teach it to others. One thing I add is trying to go even further and making it so the new feature can essentially be a configuration change (because you built the system already in the first steps). It doesn't fit every situation so it's by no means a hard rule but "prefer declaration functionality over imperative".

That’s just mostly refactoring in general.

Mikado is more of a get out of jail card for getting trapped in a “top down refactor” which is an oxymoron.