I don't remember hearing direct negative stance on multiboxing, but (same as Crowfall) for what it's worth - there will be collision detection, full physics and strong server-side control. Combat is a hybrid of action/twitch and tab target, with some exotic elements such as targeting body parts.

Current alpha access is ~$60, beta should start in early 2017, and there will be open beta before launch. For kinda quick intro, IGN Wiki (just ignore the launch date info, it's obviously dated) - http://www.ign.com/wikis/camelot-unchained