Yeah its pretty much the same stuff with more add control needed.
New mechanics are subtle, like VoG's detain. Somewhat more.
Warpriest has retaliation blast from taken. This can fuck up teams without bubbles I think. Changes I've seen so far, up to Oryx:
Golgoroth adds a random debuff and a fuck ton of cursed thralls
Oryx spawns knights with the ogres.
These changes are just so lame, though I guess expected based on previous raids. Really disappointing. Let's home for some unique weapons at least.