The Difficulty Has Not Increased In Casual Content.

[YojimboM]

You must be getting absolutely godly geared groups then, because every single time I get it, the dragon lasts quite awhile after the dive bomb phase.

I wouldn't exactly call people like a BLM in Bonewicca pants using a 350 weapon and various other 360 pieces "godly geared". I go on SMN most of the time and even I only have two pieces of 370 gear on it, everything else is 360 and below.