Archive.is believes that Cloudflare can simply provide the full EDNS data, and they're technically right. But Cloudflare won't budge because they believe this is hostile to user privacy. I haven't heard a counterargument that Cloudflare is wrong about this.
Cloudflare believes that Archive.is can simply live without the EDNS data, and they're technically right. But Archive.is won't budge because they believe it prevents their abuse prevention techniques. They mention that owning their own AS would solve the problem but that's too expensive.[1]
Blame is in the eye of the beholder, but it seems to me that Archive.is should find alternative abuse prevention techniques like other websites do. Cloudflare has an argument based on privacy. Archive.is has an argument based on the proper solution being too expensive. The expense of running an AS is disputed in this HN thread.[2]
Answer: "Yes."