(note warlock may also go back to zoo or just not be viable)
As I was saying, You won't see Kazakus in decks anymore. This will literally be the bulk of warlock decks post rotation unless new mechanics are added to the game.
Obviously idk if there will be doubles of certain things like siphon but generally you will see a list like this which is just taunt enablers and big health minions in order to get to jaraxus. Alex will basically be a turn 9 heal from like 1 hp if you can get away with that.
Essentially unless its priest, unfortunately kazakus will probably not see play
P.S.I've played matches vs warlock where they don't even get to their reno and just go straight for jarax so i wouldn't be surprised if they find themselves not needing reno as much as they thought they did.