My thing is that with the transparent world Tanjiro will see all of this happening in slowed time,
You mean a speed amp, against a character who's main gimmick beyond vaping undead is inhale better = better stat amping.
Not happening my dude. Especially given blitzing isn't allowed in speed equal if the other character is normally quicker than said amps, and well, MFTL..
so even channeling hamon through other stuff won't matter when Tanjiro can see it moving through the ground or grass before it has moved close to him and dodge it.
What? Grass can
retain Hamon (Something Jonathan explicitly knows btw), it doesn't need to travel, Jonathan can just discharge Hamon all around him in a burst due to the environment through his feet. This goes for all organic matter btw, trees, grass, even animals can be used to carry a charge (an obvious example would be the pigeon trick or Dire yeeting a rose).
He can also make them hold the charge and only release it on contact, as in, unless Tanjiro can fly.... Well he has to touch the ground eventually. Same goes with liquid btw. The environment would need to be like rock or inorganic or something for this to not be an option, and that only prevents it from being retained, inorganic stuff like metal can still conduct it much like electricity (Which I feel shouldn't need to be said given Jonathan uses a sword he channels Hamon through).
And Tanjiro won't make contact, he'll do it with the sword,
Reminder swords EXPLICITLY conduct hamon, metal in general does. I know he'd make contact with the sword, you don't need to say something so obvious, the issue is that is probably worse than if he did it with his bare hands, because now bro has to drop his sword or get fried.
in slowed time before John has any chance to channel hamon through the sword.
Unless Jonathan is 1. Amped too aka no speed advantage. 2. Durable enough to tank it and disarm given like 100x stronger LS and hefty sta advantage. 3. Has a Hamon shroud up to repel the blade (Note, this only dampens damage, but given Jonathan's inherent stat boon, it's going to be some damn good mitigation). 4. Has a Hamon flare up aka Tanjiro would be doing the equivalent of shoving a fork in an outlet. 5. Jonathan does an overdrive at the same time, let himself get cut, and the hamon from his bloodflow shocks the shit out of the sword anyway in much the same way joseph
or Sasha did.
The body control really doesnt matter any alteration made with be seen and also sensed.
Yeah, and that helps? He sees Jonathan just ripped apart his own ligaments. Now what? He isn't going to pick up "oh bro's bones just disconnected, ligaments torn and tendons split, that definitely enables him to increase his reach by 30cm and that's what he's going to do", no, Jonathan is a human, not a demon, he ain't gong to expect that type of stuff to happen, and even if he sees it happen, what's he seeing exactly? The bones and muscles are messed up? They aren't exactly moving in a natural way, it's why bro needs Hamon to negate the pain in the first place.
All he needs is to enter stw and John's gonna be moving slow to the point Tanjiro can slice his head off.
See the above, all STW gives him here, is x-ray vision and better perception I guess.