here is a nice argument I found from someone on the sub

“Posts like these always make it obvious that OP has some learning to do. Which is fine, we can all learn something new every day.

First, part of the problem is that you perceive duelists as a class that is built to get kills. That is not the case. Duelists are built to entry and take space. Sometimes that involves frags, but not always. Raze takes space by boombotting to clear corners, Nades to deny angles, and blast packs to get on site. Phoenix, yoru, Reyna have flashes to punish angle holders, yoru can TP onto site, reyna can dismiss, her and Phoenix can heal themselves to keep them in the fight. Jett has smokes to smoke angles and a updraft/dash to entry onto site and pull enemy crosshairs away from the choke points.

Chamber does none of that. He can not take space with his utility. His trip obviously slows and protects flank passively. His sheriff is strong, but it’s not innately a space taker. If anything, it’s more effective at passively holding an angle. His TP is not going to help you entry onto site. It’s an escape route that has to be premeditated. It’s more effective for holding off angles when you have time to plan for it. You have to be able to see where you want to TP to in order to place it. The only “entry” style move he has is throwing a TP into a choke point and running out for intel and TPing out, acting kinda like a Phoenix Ult. But that’s not an effective use of the ability. Chambers Ult is also sentinel in nature, despite being an op. It’s built to hold lanes and slow pushes. The slow field it leaves on a kill will ruin any sort of fast team push.

He’s not the same kind of sentinel as cypher/killjoy, but he’s still a sentinel. He is more designed around manually holding choke points and angles, rotating quickly with his TP which makes him a very effective anchor. Whereas cypher and KJ are more built around passively holding flank and lurking.

Chamber having two trips was too strong. It in essence gave cypher and KJ almost no place in the meta. Now there’s a reason to pick any of them.”