Of course, you are absolutely correct. I'll update the text accordingly. I thought EdDSA and EcDSA would be expressing differences between Cv25519 and NIST-256. I am not an expert. :-)
EdDSA is sign only - how do you want to encrypt to such a key? Did you mean cv25519 and ECDH?
I also don't think that key size obfuscation is useful, after all the preferences of the key demand a certain key size.
Small fix to translation - found by my friend
I'd be interested in seeing the results of testing the patch. Can you provide a link to the results?