Kennedy came on leaps and bounds last year, and became an absolute lynch pin of our attack through those sweeping plays. He also defuses kicks as safely as Barba, which is amazing to have at the back. This year, he continued to do those things, but they had become expected of him, which is why I think a few of his flaws were noticed more.
He doesn't possess the elite physical attributes of many of the top fullbacks, so if he wants to hit that next level he needs to model himself off Gutho. Gutho is all heart and effort on the field and makes up for what he lacks in size and strength. I don't think Will has that desire and effort in him though.
Never know though, he apparently credited the competition from Tracey for Fullback in his big step up last year. Hopefully some real competition in Dykes will make it happen.