It's a training wheel not a power up. The power up will be the far greater haki use he will show, so the fruits of his
training. Powered up Zoro=Post Enma
training Zoro.
If he would now switch the sword with one of the same grade, the only thing that would be eliminated is that "drawback afflicted"- all out Enma slash.
If people think of that uncontrolled and not willingfully performed mechanism, so it's actual
drawback, as a PU, then feel free to do so.
I think that no one truly believes that tho. I feel like it's just brought up for the sake of arguing against the "swordbois", which in most cases might be the right thing to do lol, but here it's really non sensical imo.
Like
@Enma says, no one would consider sea stone handcuffs a power up aswell. Enma, sea stone handcuffs, the hyperbolic time chamber, gravity chambers.. Those are all training wheels.
Is the quirk of Enma solely there for him to power up mid arc, tho? Yes. Might it feel "somewhat cheap" for some? Perhaps, tastes are different afterall. Enma on itself is still a training wheel tho, which is what the thread is all about.