Yes. As you mentioned, locating a cheating program and specifying its user is extremely difficult for PC. This is why they use VAC instead of their own, whereas they use LiAPP for mobile devices. If the said accelerator is detected by Steam, there will be a ban flow, which will not be addressed in their announcements because the players are not banned by AT, however, if only some of the players in the Arena are included, it means that they are banned by AT through a manual process. I don't expect the cheaters will be banned as early as tomorrow, but I do hope it will be done within this month.