I'm not sure if he is or isn't dead but I want to raise this question. Also, could Naruto bring back BOTH Sharingans for Obito and would having Kamui in two eyes on the same user work against Kaguya?
He's probably gonna give both Sharingan to Kakashi. Then naruto will get their and restores bis eyes and life. Then we will have two sets of kamui eyes. Maybe even three susanos going, Kakashi getting a temporary power up from naruto
Obito is not dead & Obito has both Sharingans already + I believe Naruto couldn't bring Dead back to Life. Once the Person is dead it's over I think but if the Person (like Gai) is still half there (or Obito) Naruto can help them.
It'd OP as hell IMO. to bring dead People back with just one clap.