quite some angere here and it seemed to ignite on that image? i don't agree with your encircled markers of ai generation. the double heart is simply separated decorations for left and right ... let's call them boob hearts. Having them separated is cleaner and easier to maintain than having only one asset piece that might be much harder to change later. common thing in data structures in general. the jacket looking differently? might simply be not a zoomed in detail of the character next to it. i have a friend who draws/illustrates by hand and i can tell you that such things happen. Also as soon as hand drawing comes into play things might not be algorithmically accurate. I had lots of discussions about getting a bit more logic into that artistic freedom ;)
As for the scenes and asset use i have no clue about that. He made it quite clear though that he is using only existing assets (in the cons sections). I don't know how much work is left to piece them together. edit: i might have misunderstood that - i interpreted that as: handdrawn style is filtering and editing of existing assets but still based on them like the other styles. it just adds the possibility to include anything that can be drawn if needed. not that it is made from scratch.