and thats my point exactly, sera would definitely hate anyone would told her it was a fact that she is incomplete and needs to be fix. Whatever powers and gifts the original elves had, she doesn't want it or need it. She thinks the Dalish, if anything, should drop their obsession with restoring their lost heritage and trying to force it on other elves (its how she sees it) and help people instead.
For that matter, its why Sera feels so at home in the inquisition. She found a group that doesn't dictate how people should live but is instead just dedicated to helping everyone.
As for me personally, I can understand any elf that follows Solas and is willing to die so that the elven people can be restored to their former glory. However, I find that this notion is an illusion. The old Elven empire was one in which the vast majorty of elves were slaves to nobles who were ruled by a handful of god like super mages. Restoring the old elven world would not change the nature of people and so I imagine history would just repeat itself. I think its a terrible plan. I prefer the vale to stay intact since I do not think people are capable of handling the god like power of the fade.