Chamber will be B tier. Along with Cypher. Slightly out of meta atm I guess(Kj is a little better on more maps) but still quite viable on most.
Breach is still not popular. And Ascent and Haven are the most popular maps atm. I think KJ slightly edges out Cypher in both. But in the future I could see Cypher's map pool being better.
Also Icebox and Breeze are just maps that are straight up unusable for Cypher(at least most. there are still some maniacs who can do some insane shit) and KJ is a viable pick on both.