So do you think Kenichi has long term health consequences from the brutal training? He has no talent, so he was essentially a lab rat for Akisame's mad theories. By the time he's 50 I bet his body starts breaking down a lot sooner than it would have, and has all kinds of problems in later life.
So do you think [SPOILER - highlight to read]: Hermit would lose a best of 10 against Berserker? Because I got the impression he only won by the skin of his teeth because Berserker was playing around too much, and the same tricks probably wouldn't work against him twice.
Not sure if you've picked up the manga but this is somewhat addressed in the Yomi amusement park arc [SPOILER - highlight to read]: Berserker playing with his opponents is a character trait that came as a result of not having any formal discipline. The guy is pretty much gifted Baki-esque adaptability with none of the judgement or follow through that would've been learned from a Master
Also looking back on Kenichi I call shenanigans on Kenichi not having natural talent. Due caught up to the level of the disciples his age and surpassed them in just 3 years; the time from series start to the finale. There's no way he would've been able to that w/o some talent no matter how good his masters were. Even his foil Sho Kano had to train for a decade to get to the point where he was.