I'm a bit confused...how these aren't major changes?

PLD's overall sustained damage has been reduced (all the potency reductions) with its burst being where the damage is, and fits in the 2 min burst window. That's exactly what they said they would do. Likewise, the DoTs have been removed and its various utility and defensive abilities have been changed to be simplified. The rotation has been completely changed as well.

Where before you did (once combat was going) Royal, 2x Atonement, FoF into Goring (DoT), Royal, 3x Atonement, Goring, Requiescat, caster phase, Swords, repeat...

...now your filler is entirely Royal/Atonement/Holy Spirit (once per Royal), you use FoF into Goring (no DoT, just a big hit ability) into Requiescat and the caster phase/swords. I'm also not CERTAIN, but it looks like your spells aren't instant cast in Requiescat anymore.

Divine Veil is changed, Shelltron doesn't use Block, Bulwark is added as another defensive.

I dunno, seems like some pretty major changes. Not sure if for the better or for the worse, though it seems made to shoehorn PLD into the 2 min window until at least 7.0 so it won't be as far behind anymore...