As a founder member of the "taxi for Jones" brigade, I agree he should go. He should have gone 2019- in which case his record would have been great two years, rubbish 18 months, good WC.
However, it now has good year, two more terrible years added on. I don't think he would ever voluntarily walk unless someone of rugby persuasion was appointed over him. I don't think a 0-3 reverse against a creditable but not wroldbeating Australia would get him going and frankly neither would home defeats in November or a bad 6n. When a balloon is rising out of control you can hang on or let go, and the RFU is hanging on.