Hidden inventory arc should have been handled differently
As expected they did an amazing job with the animation, but what this arc required was intricate artstyle more than good animation. The reasons behind this were that there are too many iconic scenes, and it was also the debut of one of the most anticipated characters, Toji.
The honoured one scene was already amazing, but it could've been something much greater, for eg Chrollo's Requiem (hxh), which is still remembered after almost ten years. People still make edits of it everyday because it was such a good looking scene
And this entire arc could've been even better than that if they had taken a different approach.