Well the update dropped, and here are my thoughts:

Cernunnos feels really, really bloated mechanically and is dependent on RNG more than any other raid boss so far. To do efficient damage to Cern, you need to hit them 9 times with the correct damage type that they are vulnerable to that turn. In addition, they also can instantly kill you randomly with their fury. Though this requires Might, Cernunnos can't be silenced, so they will eventually get Might unless you are constantly draining power from them. It's just a lot right now, and I am not sure how to feel about it all. In time I am sure we will devise strategies, but this boss feels like it was designed for characters and talismans we don't have access to at the moment.

Besides that, everything else in this update is pretty neat. I am looking forward to August to see what we may get from the new upcoming Mega Event featuring Cern.