Hi! Check out the latest blog post - it talks about that, among other things.
In brief, it's all behind the scenes. Having it be tactical could be nice - but it could also be something of a chore for the player, depending on their preferences. Doing it "right", like you said, is a big task - and it'd probably need to be skippable for someone that's just not interested in it. To be honest, I'd rather focus on adding features/making improvements to the combat and the sandbox, rather than spreading the effort too thin over an extra game type.