Wrathamon
Adventurer
They didn't get rid of the 4e versions, Raven Queen is from 4e originally, as is there ability to teleport with resistance to damage. Maybe even some of the other stuff. So the merged the 4e and 3e origins, they split the difference between fey and human origins, and made them elves, humaniods with Elven Ancestory.
I just wish they'd offered more advise on integrating 5e Shadar Kai with the previous lore, in 4e Shadar Kai we're a big deal in the FR setting, and even appear in 5e novels.
I would suggest that Prince Riven made a deal with the Raven Queen, in exchange for Shadar Kai souls being reincarnated into the bodies of new born babies born to human parents with a link to the Shadowfell, such as to Shadovar parents, Riven would open a door way into the FR shadowfell, so the Raven Queen could spread her influence in FR.
I guess it was more accurate to say they merged the two. I meant that they got rid of the human part