Abilaties question

1st
Naruto would greatly benefit from more variety in wind techniques, the guy has more chakra than almost anyone else and none of his trainer thought of making him a Ninjutsu specialist? With his affinity and chakra levels he would have been a beast at mid and close range. I doubt he will ever tap into that potential.

Sasuke, I don't have the slightest idea on what kind of jutsu his EMS may grant him, maybe laser beams? like shooting Kirin from his eyes...

2 nd
Nah i don't think. You know Naruto is kinda character who doesn't need KG, Rin'negan, Sharingan etc. nor he need any wind type jutsus.

Umm naruto is shinobi who does max. out of his 3 jutsus and excells in those areas. Surely as @unknown0 said, it would benefit him, it would add new dimension, but he is not that kind of a character.
If he becomes Hokage, he would be the only Hokage with one Affinity...kinda lame, but master rank in jutsus. Like some martial arts...in chinese kempo there is many styls, yet apprentices, masters, practices only one and they made themselves master class in only one art.

For Sasuke i would say...yep he will get new power...Maybe ninjutsu, maybe genjutsu...i bet it will be powerful.

3rd
Well i personally believe naruto has to be versatile in ninjutsu. It's not always about how powerful you make jutsu. For example most of sasuke's chidori technique's do not create craters but his variety in them has helped him alot. I mean instead of having an overpowered chidori, he has chidori nagashi, senbon which are what helped him alot in his fight against deidera and itachi and also it opens up the chance to learn different fighting styles to fight different types of opponents. Ninja's like danzo or deidera are bad match ups against someone like naruto because their fighting styles do not compliment his so i think it would be very beneficial to naruto to learn different types of ninjutsu and not always focus on strengthening his rasengan.