The Shen’dralar leader reached an accord with Tyrande after we reclamed Eldre’thalas.
I looked into it after the Exploring Kalimdor book said there was still ancient knowledge to be learned from Dire Maul.
After Mordent Evenshade successfully reached an accord with Tyrande Whisperwind, upon which they began training a new generation of night elven mages at Teldrassil and other parts of Kalimdor.
https://wowpedia.fandom.com/wiki/A_Cautious_Return
But it also warned Azshara was looking to reclaim lost knowledge from Edre’thalas. So I suspect the NE’s may be called to help defend the Shen’dralar from naga attacks in upcoming expansions.