Sakura best developemnt would be stop being shallow and marry Rock Lee or stay single
If Neji survived the war he probably would end with Tenten
Karin is really pathetic, she's slightly better than Sakura. Yeah, i'd rather if sasuke had a children with Karin, also she's more independent, so their having a stranged relationship with her living in Orochimaru hideout and him hanging around the world would fit more the character. I don't think he would ever love her, but they match more.
Rin sould stay with Obitio if they were alive, just because... yeah
Neji and Tayuya
Lee and Hinata
Naruto and Sakura
Sasuke and Karin
Great parings, but what about:
Sakura and Orochimaru
Karin and Naruto
Lee and Kurenai
Sasuke and Kaguya
Hinata and Kabuto?