Kilbane was "slated" mainly because he looked lazy because of the way he held his body - shoulders hunched and a bit gangly. However, what his detractors didn't realise was that he was confident enough at a young age to have an effect at both ends of the pitch because he was good in the air when defending and could put in a very decent cross.
From what I've seen, Hayhurst doesn't possess those qualities - his best bet is to become a "tidy" player like a Gary Swann, Simon Davey or Ian Bryson who doesn't seem to do very much yet doesn't give the ball away very often, is versatile and occasionally has the wherewithall to appear in the box to finish off a move.
He's young, and might get there - it's a case of whether he's intelligent enough to acknowledge his limitations and adapt his game accordingly.