Re: A.I. Article From The Verge says "currently no plan to let you turn that off.".

@Noodlesocks Might be happening already. From a quick scan-read just now, the article does state that there are modes without bots and there is a cut-off of 64 bots for 'the main event' (guess that's Conquest/Breakthrough):

"and if you truly hate bots, you’ll be able to play other modes. But the main event allows up to 64 “AI soldiers” to help fill a game, depending on your region, platform, and how many real-life humans are available to join up".