I wonder who's going to teach Sasuke without Oro around? Kakashi is a good teacher in this but not as good as Oro is.
Is Naruto being thaught by Jiraya?
1)He'll learn like everyone else.
Like Kabuto did, like Itachi did, like Shisui did, like Gaara did. None of them had S-class tutors, all of them ended up S-class.
Sasuke has access to the collected and collated resources of the Uchiha Clan as recovered by Hisana, the classified and unclassified resources of Konoha, his own summon clan, Kakashi and HIS network of resources, as well as everything Hisana can beg, borrow and steal on his behalf.
Sure he lacks the personalized attention of an S-class ninja, but he has access to the periodic attention of multiple high-A/low-S ninja instead. And while he's not taking in Orochimaru's specialized cocktail of anabolics and other drugs, Im not convinced he needs them, and he has the services of arguably the best medic nin in the world at this time in Tsunade as s consult.
2)Naruto is learning from a variety of tutors.
Jiraiya has dropped by to give lessons but he's generally outside the village.
Chakra Scalpels never really felt like a healing technique to me. I know it's canon but it's clearly stupid. I mean, what's the use of it as a healing supplement technique?
You forgot when you have to perform field amputations, or fix gross body trauma.
Like when Killer Bee caved in Sasuke's chest. Or Rin had to clean up Kakashi's ruined eye. Or someone had to clean up Ei's arm after it was amputated to prevent the flames of Amaterasu spreading. Or when someone had to clean up Neji's chest after that harpoon went through it. Or remove all the shuriken that Mizuki riddled Iruka with.
I mean, this is Naruto. Shuriken, kunai and shrapnel injuries are common.
Anyway, in general, I think of it as the difference between most Hyuga and elites like Hinata, Hiashi et al.
A normal Hyuga has to simply target internal organs in combat.
An elite can see and target tenketsu.
Similarly, the vast majority of medics need their eyes and smell and sense of touch to deal with combat trauma.
In a well-equipped hospital they have machines and seal arrays to help visualize injuries and focus their efforts. But in a field hospital, or on a battlefield, they have to actively open incisions to drain blood and air collections, ligate bleeding blood vessels, flush venom injection sites, and rejoin lacerated muscle fibers.
I would not be surprised if exploratory laparotomies were exceedingly common procedures.
Then there are elites like Tsunade, Sakura, some other jounin like Kabuto and Shizune, plus Hyuga medics and some sensors.
Who can tell whats wrong with you by clasping you on the shoulder, and can guide their chakra to fix things using that mental picture. Hyuga cheat, and can simply
look. So can some sensors.
They are all rare.
Then there are the actual freaks of nature.
Senju Hashirama , Uzumaki Karin, Juugo to name but three.
Those people come with inborn abilities that have preprogrammed chakra macros for healing other people.