>>528863653
Several of the girls have an A, Z (or maybe a sideways N?) hidden on their designs. It's either for azarashisoft or amakano, I assume.

>>527854148
It's the style of the time. More colors, two-tone hair, etc. It's how pretty much all VN art is generally trending.

>>527478908
It's there in the older games, but to a MUCH lesser extent, they really went crazy this time.
Speaking of meta jokes, the sisters and Sayu have the 'A' 'Z' and 'N", but where are the letters on Letty or Touka?