I don't think it does. I mean, in every Star Wars movie you know the baddies are going to lose. Is your experience wronged because of this knowledge? No. We know that the Bothans will get the plans of the Death Star into Leia's hands.
What we don't know is what, hopefully, the writers of this movie will focus on, meaning, the path and fate of the characters they are creating for the movie. Will the protagonist die? "Many bothans died ...." Who is going to survive or not? Who is going to grow through the movie and who is not? What kind of growth will it be? What kind of arc will the characters go through? All we know is that a piece of info gets to Leia. We know nothing about these new characters's future.
Unlike the other prequels, where we knew pretty much where Obi Wan, Anakin, Luke, Leia, Palpatine, Yoda, etc., etc. would all end up. They could still have written a good trilogy out of it, even with all that handicap. But here, there's no such handicap. It's all in the dark! I love it.
Also, the title clearly suggests there's the possibility of being a "Rogue Two" movie if this one succeeds. I'm way more interested in this movie than the "young Solo" or the "Bobba Fett" movies (are those even going to be made?), which have no actual sense of mystery to them, do they? We know the characters. Do we really need those movies? I think this movie is going in the interesting direction: it's a vast galaxy, it must have far more interesting stories than just "the central one".