Well, to be fair datakim does have something legitimate to say.
I'm not saying that Naruto didn't get stronger over the timeskip. He did. There's no denying it.
HOWEVER, datakim brings up a very real point: Akatsuki are a bunch of tough motherfuckers. Uchiha Itachi and Hoshigaki Kisame ARE a big deal. Itachi killed his whole clan and can easily take down ninja like Kakashi, and nobody knows about his eye/health degradation meaning he has the threat of coma-ing anyone with a LOOK, let alone his other abilities. Kisame's strong enough to be known as the Bijuu without a tail. Enough said.
And they aren't in charge of Akatsuki, which means that there's probably someone powerful or cunning enough to get them working under their banner.
Now, its good that Naruto worked on his basics. He did get some skills, but the fact is that for the most part, his amazing feats such as beating Shukaku relied upon him relying on the Kyuubi heavily. And trying to use more of the Kyuubi's chakra was indeed one of the major things it seems that Jiraiya focused on in canon.
However, this was a bad idea for several reasons and Jiraiya really should have known better.
The first is that, as implied by the Uchiha being segregated after the Kyuubi attack, it was thought that they might have a way to control the Kyuubi like Madara did, so why would you have him rely on something that could easily be turned against you especially with said Uchiha as one of the ones after Naruto. Why would you teach someone to rely on the Kyuubi's chakra if it could be controlled by Sharingan? And hey you know what Sasuke did when he encountered Naruto after time skip? He fucking subdued the Kyuubi with his Sharingan.
Secondly, this is an organization going after Bijuu, which means they're either strong enough to subdue them or they have countermeasures against the Bijuu to subdue them. Hell, Orochimaru was able to deal with Kyuubi Naruto with one impromptu seal in the Chuunin Exams and he's WEAKER than Itachi as far as Akatsuki goes, and there's that seal that Jiraiya made to make the kyuubi chakra go dormant if Naruto went out of control, so there ARE countermeasures that can easily be applied to stop the Kyuubi's chakra from helping Naruto. Either way, it'd be best to make Naruto as strong as possible in the time they have as to make sure he survives, and making him rely on an uncertain quality such as the Kyuubi isn't a good idea.
Now, they're stuff introduced post time skip, such as elemental training, clone training, and sage mode. These have importance after the time skip for one reason: to quickly make Naruto into someone who is strong enough to fight Akatsuki. And they make Jiraiya look incompetent in hindsight considering with THREE YEARS, how little Naruto seemed to grow in comparison. They're powerups that were put into existence because Jiraiya...didn't make him strong enough to face Akatsuki.
Again, these are things, though well integrated in story and developed after the fact, that make Jiraiya look like he wasted three years of Naruto's time.
The clone training alone is, again retrospect to new retcons, unforgivable for Naruto not to have learned by the end of the timeskip. Considering how many clones Naruto can make it was a waste of INCREDIBLE learning potential as he can make hundreds of clones.
Elemental affinity is really something that should have been covered, considering how valuable and necessary it is to making new jutsu and that normally it takes a while to learn.
Sage mode, however, should have been the thing Naruto spent the trip learning. It makes him insanely more powerful, after all, and even if it would be something kept as a 'only if necessary card' by word of Jiraiya. And while learning it, they could totally have worked on Naruto basics safe at Mount myoboku where nobody could fucking find them.
Again, those are all things that only existed after the timeskip, so there was no way Naruto could have learned them from an outsider's perspective, like we have, but in inverse it makes Jiraiya look incredible incompetent as a teacher, which we know he isn't.
Don't get me wrong, I like the idea of Naruto learning politics a lot. However, as has been stressed he's got, excuse me for the term, Ninja Chuck Norrises coming for him, and they aren't sure of how many there are in total. Making sure the Kyuubi's container doesn't get captured and is strong enough to fight back and at least have a chance of winning is kinda more important than learning politics at this point.
And, furthermore, in canon the title of Hokage doesn't really go to the most political savvy. It goes to those who have the right mindset, to protect the village and its people, and the strength to do so. Its why both Hiruzen and Minato were made Hokage. Politics and being able to plan are important, yes, but that's why the Hokage has advisers to ADVISE the Hokage. If the most intelligent and cunning person was the one who'd become Hokage, Naruto would not even be in the running with people like Shikamaru who is the genius planner incarnate.
So again, I like the idea of Naurto learning politics, however it continues the canon feeling of incompetent Jiraiya as he feels like... stupidly arrogant considering the circumstances.
"Don't worry about the numerous insanely powerful people coming for you Naruto or the fact that you have to be strong enough to stop Orochimaru in three years to save your friend because you and I both know you refuse to give up on him and will go after him before Orochimaru can steal his body, whats more important is that you learn politics, because when the time comes you'll probably be strong enough to deal with these legendary powerful foes when they come after you en-mass... probably."
Are things like politics stuff Naruto probably SHOULD learn? Yes. However, again, it pales in comparison to the threat of a bunch of already powerful psychopaths gaining even more power in the form of the nine tailed beasts. There's really no way that any and all advantages shouldn't be given to Naruto because if he's captured it means what happened thirteen years ago when the Kyuubi 'attacked the village' happens again and again and AGAIN.
