The user must be able to choose the word list used to generate passphrases.
A passphrase must be made of words that are easy to spell and remember. The current list uses words that are too long, hard to spell, and completely out of the usual vocabulary.
And that’s for native english speakers. I’m French, I live in Germany and work with Swedes. I guarantee that none of us are able to type correctly a passphrase with “quarel”, “mannlinness” or “konsult” in it (typos are intended), like the one I just generated.