First, the story criticism-- as in why the fuck are they even doing this? Stupid question... because it'll make a shit-tillion yen and sell more magazines, action figures, movies, etc. etc. without Kishi having to do anything creative.
Also, remember how when Naruto started off as a series, and all the characters had to be introduced to us and developed? And how the world of Naruto had to be explained? You know... typical stuff when starting a story. Instead of spouting out all these details you'd have no way of knowing without knowing everything about Naruto, and making every relevant character a miniature version identical to characters you already know.
Oh wait, scratch that... with all the childhood flashbacks we got from Naruto, they're not even miniature but identical copies of characters we already know. Why bother doing character development when you can just make copies of characters you already have? Why bother trying to explain your story to a new audience when you know the only ones who are going to read this slop are the ones you've suckered in with the first one?
Except for Sarada I guess, but she's so plain and uninteresting that who gaf?? Clearly, this isn't a stand alone story, and there's no real point in "ending" Naruto if you have to read all of Naruto in order to know wtf is going on in this story... still named Naruto... but with a protagonist named Sarada. :|
Speaking of Sarada though, despite that she's even plainer and more generic than Sakura somehow (wow srsly?), as a fan boy, you can't help but be interested in this girl's future...
I mean, everything in Naruto is genetic right? With every character's lineage basically equating their powers and destiny, right? In that case, Sarada is gonna be ridiculous. I mean her Dad is the strongest Uchiha to exist since Indra, and her Mom is Karen, who was like the last of the really pure Uzumaki clan-- even Ochimaru was fascinated with her bloodline, and the pure Uzumaki-line is so entwined with the powers of Senju that Madara saw Nagato as the best inheritor of his eyes.
So... Sarada has the Uchiha "Eyes" and the Uzumaki "Body/Chakra", and may be the first person ever born in the history since the 6th Sage with the potential to unlock the Rinnengan "naturally". Definitely broken as fuck.
Now Naruto's kids might also have the Uzumaki blood, and the Hyuga line descend's from the Sixth Sage's brother-- but both the kids lack the Byakugan (you can see the pupil drawn in the middle of both their eyes), and Naruto's Uzumaki blood isn't "pure" (he's unable to use the Uzumaki chakra chains). Plus, remember that the Uzumaki blood is stronger in women, so either way, Sarada's inheritance is way way stronger than Bolt's.
She's gonna be beastly (assuming this manga doesn't die, but that's unlikely)