Similar experience here. I started new life and after doing quests level 2-4 on r4 I only had 2 champions (no champs on level 2 is normal but on 3-4 is new). I even thought that maybe the quests 2-4 are now treated as below level 5 so no champions at all but 1 named scorpion spawned as champion and after splitting an ooze, 1 part was a champion too. Reapers were spawning normally, I killed a ton of them.