I really don't think Vettel's head was in it in 2014. His child was born over the winter and after each day of testing he was flying back to Germany to be with his family, and only flying back just before jumping in the car. There were more important things in his life than F1.
Also Ricciardo won three races to Vettel's none, but only because Vettel was screwed in the pit-stops at the Canadian GP (Ricciardo's first win). Vettel also lost out at Hungary (Ricciardo's second win) as he was in the top 4, 7 seconds ahead of Ricciardo, but the timing of the safety car meant the top 4 all missed the pit entry (Ricciardo was able to pit, coming out in the lead after the leaders pitted the following lap, leaving Vettel in 7th).
I'm not excusing his lacklustre performances that year, but there was much more to that season than meets the eye on paper alone. I'm pretty sure had Ricciardo turned up in 2013 and not 2014 then it would have been a very different story. Hopefully it happens again so we can see a rematch.
Ricciardo finished 2nd on the road in Australia before he was disqualified.