Hi David, again I'm not saying that your understanding of Aquinas is not viable, but Levering seems to understand Aquinas' position on John 14:28 like I do. But he may qualify these statements elsewhere. https://books.google.com/books?id=_zf-AwAAQBAJ&pg=PA42&dq=aquinas+father+greater+than+i+john+14:28&hl=en&sa=X&ved=0ahUKEwjJysHhoKbMAhXHJCYKHV9oDPYQ6AEIIjAB#v=onepage&q=father%20greater%20than%20i%20john%2014%3A28&f=false
See pages 42 and 269.
All the best,