(6) I too started this incidental to another project (the diagrams) and now have ended up in this rabbit hole where it's become its own project.
(4) Creating this kind of "narrative" for the diagrams is definitely something I have considered. e.g. there could be a character who had written them all and we found them in a book in the character's lab. I have this recurring thought about them being found on a CRT monitor in a forest, half buried in the ground and covered in moss. But I haven't been able to get a CRT aesthetic working well with them and for now I'm sticking with the hand drawn look.
(1) Yeah I did consider labelling but I am not the arbiter of what makes sense haha. Also actually I think there are probably different axes in which you could create that kind of scale. Like sense versus truth for example. There is probably a whole article to write just around that.
Thanks again, I definitely will continue to share my work :)