If I am honest with you, I think Mr. Moyes's career here stalled due to the fact he actually lacked confidence.
He seemed to have an inferiority complex and withdrew into a shell when we should have been kicking on.
Most noticeably in the spring of both 2008 and 2013 when we were very well placed and looked favourite to take a CL spot until the negative tactics screwed us over.
Then there were the Wembley losses of 2009 and 2012 when he never even tried to kick on after we went in front.
Probably a good enough fit for Sunderland as survival is the only thing that matters there so grinding out enough one nil victories to reach the forty point mark will be regarded as a splendid season.....especially if he reached that figure with three or four games to spare.
On the other hand I do believe the football landscape has changed considerably in the three years since he left us and it has changed utterly since Moyes's heyday between circa 2004 through 2009 so nor will I be shocked if Sunderland are once again mired in the relegation fight.
I like Sunderland so I hope he improves them