While i agree with that, you have to remember its blizzard we are talking about, they take years, to even state something, and they only said when they are pressured to it.
Having both blood and high elves in telogrus(?) seeking their knowledge, and saying void elves are trying to replicate the experiment, already opened the roleplay to people playing void elf say they can be from both groups, they just need to say "hey they discover how to do it again, and now can do with the elves who want that" and again, if they are not pressured to it, they will not do it, but i do agree they need to.
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What novel? isn't shadow's rising also about talanji, zekhan, Nathanos and Bwosandi? its a bit too much ask to shove veressa there, maybe alleria will mention her, but i doubt it will be more than that.