Sounds like we can layer our instances and raids. I don’t know if we’ll actually be punished either. “Their streamer core” aren’t being banned by using the exploit.
Esfand using it to respawn MC: https://www.twitch.tv/videos/479284719?t=03h54m03s
Using it in a instance: https://www.twitch.tv/skarmtank/clip/CorrectNeighborlyAnteaterAliens
Allegedly Asmon was using it today as well in instances.
Blizzard, if you read this. Your server is utterly a joke. If this was happening on pserver people would migrate off of it. Personally I can’t tell the difference between a pserver and Classic. Additionally, you gave us a feature, layering, which no one asked for unfortunately. Look what it has caused 
Will pserver ultimately be the superior product at the end of the day? Sigh…