Well most of thing you wrote is right, no personality and such on some char art, but... For pain chikushodo... Doesn't feel it's cute enough for animal path??? Dude all the pain is controlled by nagato, they don't have cute expression, animal path included also in it. While i agree pain chikushodo doesn't have much detail there, but... If you want a cute version, that cannot be done with official art, because they made it to express nagato feeling, so if you really want the cute version, that will be fanmade art...