Regarding Hinata i felt some trolling on her words.
WHen she made her vow on "path to radiance" it had clearly romantic undertones but suddenly turned out some sort of comradeship her words turned out to be exactly similar to Shikamaru's father and even then it was bought up on the previous chapter.Later she reassures her will to be at Naruto's side but once again it was some sort off comradeship.
She's totally ambiguous.
Totally. But after the last events, unless something real crazy happens, her development cycle is pretty much over with. She stood at Naruto's side, held his hand just like she mentioned and even got a reason to start being more responsible and productive for her clan, though I doubt it might happen given her lack of a decent purpose in life. However if you look closely, every secondary character is finishing their development cycle during these war events. Plus, just like every other story, after the less characters roles are done with, what normally happens first, we'll have the resolution of the main characters drama probably taking place during the final battle between the two protagonists.