I think if I had to to put my finger on where these latest volumes could use improvement, it's the disconnect between the environmental lighting and the characters. The colourists are talking a big game with the rainbow lights over the Performance Floor and even the warm light of the exterior lanterns around the outside of the dome, glowing up the scenery in more complex ways than before. But they still seem to be extremely limited in what they can do with the actual character art if there's not shading or a screentone in the original art to justify a change.
This panel exemplifies it best:
Yellows and purples and reds along both the balcony in front of them and the roof behind them, but every living thing in the scene seems to be lit head on with plain white lights. I can't think of any way for none of these characters to be splashed with any of the colourful illumination. Only the outlines inside King's suit seem to be picking up any of the rave lights the scene wants to have.
The more ambitious lighting is a new and welcome development, but its implementation now feels like a half measure. Either give the colourists the freedom to bathe some characters in the coloured lights, or consider going back to the old way of just lighting whole scenes with a level ambient whiteness.
And if I'm honest I still, even after having the whole day to stew on it, think the red and white of the early version looks better.
They could still have made the rainbow lights work over the red, I'm certain, and then you'd still have a far more vibrant Performance Floor to work with after the fighting starts and the lights return to normal.
–- Update From New Post Merge ---
I don't know what It is but I feel the colored style has changed a lot, I read water 7 (for example) and then wano and It has changed a lot.
They've come a long way since volume 1, that's for sure. I've been looking back at some of the early volumes recently, and they can be so rough compared to what we get now. I'd be really interested to know how big the digital colouring team is and what its turnover rate has been in the decade or so since they started releasing these, or if it's all freelance or what. Which style shifts are the natural result of longtime colourists improving their technique and developing their personal style, and which ones are generational shifts as staff come and go?