The official update notes for the January 14, 2019 content update to Visions of N’Zoth are here.

Read the complete notes here.

It should be there now. We were in a brief temporal anomaly, but I think we’re clear again.

Just reiterating what was said by someone else, but at rank 15, the legendary cloak will have 50 Corruption Resistance at which point you’ll be able to earn a Malefic Core each week which will further increase the resistance by 3 each time. You will have the ability to get the legendary cloak to rank 15 faster than in 15 weeks.

I do not know what these ‘adjustments’ will mean, but will something be done to lower Operation Mechagon to a Heroic Dungeon?

Yes, it will be at Heroic level when Operation Mechagon goes live with the two parts.