That does ring true with me as well - all those greens yielding to greys and browns. The art is still good on the Populars, but the title is always the same blocky font, whereas Avon kept doing custom typography.
Recently, I was doing some mental gymnastics as to whether Popular is my favorite or Avon. A straight-up comparison of the first five hundred or so is impossible for me, so I broke it down a 100 at a time. Avon won the first hundred, that I know. I'll figure out the other centuries today!