A lot teams/players were built around the chamber players in their team and setting them up for most of the time. we saw a lot of no duelist comps work well on certain maps..
Players like Wardell, dicey, boostio, cryo, seven became better in this meta. Even though these players were previously duelist/jett players, picking chamber like a one trick long made other players in their teams to pick the primary duelist role.
Even though wardell has got crazy aim, his agent pool/role would have more impact on his performance. During stage 1 dice was being more of a 2nd duelist playing skye most of the time and was very mediocre. Cryo is a phenomenal jett player and very sharp with OP and so is zekken. Even with optic things are kinda same as xset.
Even though the chamber changes are significant, they are not that drastic. He could still be viable on some maps. But there could be a lot of maps/situations a traditional sentinel would be better.
Same things could be said about DRX, KRU, Fnatic, zeta division (maybe. I didnt watch japan regionals),
With jett also being in a weird situation i feel like there could be more room for other duelists in Pro Play. And i feel like after this patch things will change drastically in pro play.