I've playing as my main Fighter tank 26,5k IL with 620k HP (inside Dread Vault), and this is my final impressions after the last patch note:
First run: No problem Second Run: Feeling that monster's and boss damage was increased by 50%. Yshiggol's HP has increased, but still completable. Third run: Was my impression or the monster's damage increased a lot ? Many times I got 300k+ damage with melee attacks. Fourth run: I think the monsters have now an extra Zero in armor penetration ratings... Fifth run: Never tried with the current setting. Impossible to me to finish.
The last Tales of Old (Frozen Heart) was using the current Module 16 rating system, and I remember very well that it wasn't hard the way it is now to finish the dungeon event with 5 consecutive runs.
Seriously, even with this extra week, is still almost impossible to many players to get the Fabled Chapter, since a very very few have the gear to barely finish a 3x or 4x run.
Seriously, this is demotivating many people! Personally, I want to enjoy more this event, but I'm a little frustrated atm.