What portrayal? Shusui's a black blade while Enma's yet to be made into one. The portrayal is clear.
Enma got better focus than Shusui at his time. Literally hyped for something like 5 chapters straight. When Zoro could use Shusui they weren't sure he could use Enma.
New weapons who comes in replacment of Shusui just before a war in which they will fight Kaido.
If you think the training is a PU when it as less focus than Enma itself but refuse to acknowledge Enma as a PU you are biased.
Except that Future Sight and Foxfire style aren't comparable in the slightest - one is an advanced form of haki while the other is a mere party trick when not fighting fire users.
Foxfire style is literally a move, it's no different from what Zoro showcased this chapter - using air slashes like sky walk.
Like Foxfire style isn't similar to the move Zoro did in this chapter.
This new attack is more a variant of Ultra tiger
You understand what you say it's like me saying CoC coating isn't a PU it's just using CoC like you use CoA lmaaooo
Why Zoro tried to learn foxfire style if it's not a PU ? stop dodging why he would learn it