I was with you until you said that Sasuke would learn to easily manipulate Mokouton. Do you know that Madara is only able to use Mokouton because he has Hashirama's DNA, he is a genius when using Jutsus, and have perfected using it way before he died. So how do you expect Sasuke to easily use it when he hasn't even perfected EMS yet.
I believe that Naruto will not only get the other half of Kurama's chakra but he will also go through a transformation into a weaker Juubi jinchuriki form with better control than Obito. Although I don't know how Obito will or will be able to control the Juubi's power when it took two of them to control the Juubi through both of its transformations. I believe that the Juubi will take over Obito's body and will wreck havoc on the ninja word in a more precise way. It should be that easy for Obito to control the power of the Juubi even with the Rinnegan.
I didn't mean Sasuke would use Mokuton. I meant that Sasuke's manipulation and control of Enton would be like how Hashirama controls and manipulates Enton.
Examples;
Hashirama - Flower Tree World
Sasuke - Field Encompassing Amaterasu
Hashirama - Shinsenjuu
Sasuke - Construct made from the flames that Sasuke can control and attack with similar to Susanoo
Also, Sasuke probably could coat his Perfect Susanoo in Enton for even more defense+ ENTON SWORD.
All of this is hypothetical though.