Sorry guys, I just always had issues with this character from the beginning. I think it was just really bad character writing on the shows part. She literally went from being the scorned girlfriend, to the alcoholic, to the half-assed Black Canary replacement, to an assistant DA. That's not giving the audience anything to work with in terms of liking or really cheering for the character.
I read an article online already that basically said this is not a fake out, Oliver had nothing to do with her death, you won't find out what Oliver and Laurel discussed until Season 5, and they are not bringing her back to life. She will reprise her role in an episode of the Flash.