did they widen skill search for Champs in arena?

So after placing in diamond 5 in FFA i was playing trying to get onyx again, the first couple of games i did alright and got diamond 6 then i started matching against champs and un-ranked players. I was being spawn killed left and right.
I dont see how a diamond is facing champ 92’s or whatever they are. I would not mind it if i was onyx but currently im diamond 6.