It’s vague because “client-server cryptography pretending to be end-to-end” could be referring to any of a number of different flaws when you could just be specific in the first place in as many words, and it’s misleading because actual client-server encryption in this case leaks private data to the server passively, which is a significant difference. Feel free to popularize a separate term for this if you don’t like “end-to-end”.