Indeed! We better get a true confirmation on who Sarada's true mother is very soon, otherwise my interest in half the gaiden is going to wane even further than it already has. Hopefully it's Karin, because Kishi has overused the Red Herring cliche throughout his manga and now it seems he is using it in this gaiden.No problem. And yeah, I will feel like I wasted half the manga on nothing, especially since that has been the bulk of the series. I know the series is short, so there isn't time for BS red herrings.
On regards to something like this whole thing with Sarada, it's time he actually does something that is not a red herring for once. Truth be told.