Imo a 200 kcal negative is on a practical level BS. I mean, how can you hit that with any degree of certainty? If if your days are mundane to the point where you're looking forward to your bowel movements, or reading the next @CroLifter 's post about prolactin and/or Mk (had to sry), your kcal requirements will be off by 100, 200 kcal's probably. But I do agree with the sentiment of starting slow and adjusting as you go. But I would rather add cardio then lower kcal's personally.
As for me, I loose bf to easily and I skate a lot so cardio is not a problem, rather, eating is. I guess I can go over a minus 1k kcal's some days, and other maybe only 500 ... What I'm trying to say is that I more or less wing it, by feel, until the last month where I usually count the damn calories. For me, if I'm not force feeding my self, I'm basically in a cut.