But removing Camile from the area will instantly end it. It's by far the fastest and cleanest way to get someone out, so I'd expect Poppy, Alistar, Janna etc to really ruin her day.
Having played around with it, it feels very much like what J4's Ult should have really been - A way to isolate and trap key targets. It leaves J4 in a strange niche where he's an AoE Teamfighting, Initiating Assassin with some buffs for allies thrown in on top. It's sad that Camile seems to be all set to take what his role should have been, but on the other hand it does allow Riot to refocus J4 more towards a role as a "Team Captain", where he effectively leads his team into battle from the front rather than the strange niche he seems to be falling into where he's equal parts Support, Assassin and Bruiser.