It is not so much what Williams has done but rather what Vardy hasn't done and that's play good (or even acceptable) football for over a year. At times last year he was barely WAFL standard. I realise you said a fit and firing Vardy and sure, if he is at his best, then he would be ahead of Williams and I would prefer him as second ruck/forward to Hickey (who I see as a first ruck). But it has been over a year since we have seen any form from Vardy and even then, whilst he was very useful, he was no star.What has Williams done to show he is better than Vardy? He is a good prospect and that is all. Vardy in form and fit is more than useful 2nd ruck. If it weren't for.him we don't win the 2018 flag.
Given how long it's been since we have seen form from Vardy, the second ruck/forward spot is up for grabs. He hasn't made it his own. My preference would be to get games into a young guy with potential (assuming NN is playing) than into a guy turning 29 this year who has had a well documented injury history. This is especially so given this could be Kennedy's last year. But if Vardy is back to his best (which we will soon see I guess), then he would likely deserve the spot ahead of Williams (unless Williams also lifted a level).