Sources?
If that's aimed at me, the evidence was right there in GOF: Rowling needed Hermione (her admitted self-insert character) to explain to Harry why Ron was acting in a way that was totally contrary to the way he acted in the first half of the series. That she needed to do so made it clear that Rowling herself knew that she couldn't sell Ron's character change with his actions alone and needed to spoonfeed the explanation from "Ms Exposition" right to the audience.
And Hermione's explanation was basically loaded with "Well, he always kept these feelings hidden but now he can't." which is another way of saying "Yes, I know he never acted like this before but this is how I've changed his character, deal with it."
As for Harry being undeserving of Ron and Hermione's loyalties, that's evident throughout the series once you do two things:
1) Stop seeing things solely through Harry's POV.
2) Stop thinking Harry and his not-so-Epic Destiny are the centre of the Universe.