Skoll Shorties

Sylvanas is seemingly doing this for a greater good and i don't even think she does want redemption, she just knows she has to do this. It's a really long game and it's too soon to draw conclusions. Seems to be just a case of "the end justifies the means"

We must see what happens in Shadowlands. There is speculation about a plan which consists on everybody going to Shadowlands, to allow reorigination/Azeroth's birth without us disappearing. Death is not the end in wow. Those elves are probably not lost forever.

And the tree, well. It was destined to fail. They already lost their immortality because they tried to replace their original tree with that fake one.