(adsbygoogle = window.adsbygoogle || []).push({}); I thought I would compile a list of differences for you all. If I missed one please let me know.

First off, all enemies are 33 and because of the heroic modifier, they are much more aggressive (meaning they follow you longer and fire quicker)

-Abyss
The cursed thralls are now Hallowed Thralls (majors)
Knights are Hallowed Knights
Ogres at the end are Hallowed Ogres

-Bridge
I didn't notice any differences.

-Shrieker Hall
The Shriekers respawned after about 5 seconds of being dead. I don't know if this was a glitch, or even if the barriers came back up, but I imagine it was intended it is to prevent players from causally walking through.

-Deathsinger
I didn't notice anything different.

-Crota
No chalice of light/health regen (players must rely on gear/abilities to regen health)
All Knights are Hallowed Knights.
Killing both Knights in the tower will spawn a Hallowed Wizard instead of a sword Knight.
(I haven't tested this part on normal) There is a gate keeper underneath the crystal (where you drop down before the deathsinger) to prevent players from using that hall during Ogres.
Biggest difference in my opinion, no matter what Crota will enrage at 25% health. The way we beat him was on the second round of the second session (right before Ogres) I would stop hitting Crota just before he enrages. Then after Ogres, we would drop Crota, I would hit him and he would enrage. We completely ignored the Oversoul he spawns, and after his invulnerability period we would drop him and I would finish him. In my opinion this is the best way to do it because during enrage he spawns 2 ogres and 2 oversouls rather quickly, best not to stick around for that.