Naturally one is entitled to decide what they consider to be classic. I could point back to things like Gigantor or Astro boy as “ classic” given they both gave rise to the monsters that Manga and anime have become today. Rather I'm looking to the classics that broke the genre into new territories. Akira, Fist of the North Star, Guyver, New Dominion Tank Police; so many that set the stage for that initial burst into super stardom in the west and took the whole medium into a new direction.
I can't say any of the new stuff lacks the creativity or power behind it- however it feels that many creators have become slightly complacent on the success of the industry to carry them on, or just rather not take much of a risk. On the other hand some creators seem to take the idea of risk and urinate on it while balancing on an electric fence. In that way they push too far sometimes and fall into riding that beast to excessive levels. Something about the story telling, imagery, and universal themes have shifted and are not what they once were. At least in my heart they are sorely missed.