I dunno, it depends on how Kodachi writes her. As for her being this strong, then yes she is. She has perfect chakra control (Sakura's) and the Sharingan. The two together give you the ability to learn any jutsu (except KKG and special condition jutsu). Kakashi made that clear when he was teaching chakra control to Naruto and Sasuke. And the Sharingan allows seeing in slow motion as well as hypnosis. None of those powers are ass pull. She uses it like an Uchiha should use their Sharingan, while other Uchiha were nerfed due to plot. As for learning g Chidori and other jutsu, then that happens off screen. The author doesn't care enough to write panels of characters learning jutsu or studying, unless they're Buritto. It's one big Buritto D ride fest. Even with Burrito he didn't show him learning gale palm, surging sea, his lightning jutsu, he off screened it. And we know that was blatant asspull, unlike Sarada's, since he doesn't have Sharingan or her level of chakra control. Anything Buritto pulls is an asspull (MC and gets screen time), anything anybody else shows is acceptable (off screened so we don't know what's happening).