Any major use of one energy would override the fel taint with elves, since it was not a corruption and more a side effect of being nearby fel magic, void, arcane or light would do that just fine, what we have today is a reflect of that.
the "alliance high elves" will not charge going forward building a new future, the ones who will are void elves, the "alliance high elves" who are not void elves(like silver covenant) will stay in the same limbo they were before, because there was lots of reasons of why they story didn't progress, unless they turn into voi elves
I know things are all all wild these days with people making up stuff and adapting others, but the void elves are still void elves(not high elves shadow priests), regardless if they look like a high elf, they are not the same race, and seems like a lot of people completely forget/ignore that, thinking HE is a state of spirit/faction allegiance/appearance when for years they fought against some of those concepts