Chisnall's the 1st youngster I've seen in a long time that looks capable of breaking into the higher echelons of the PDC, like his throwing style, although unusually he kept altering it in the 5th set, hopefully just playing for time to concentrate on the 6th set(not a great strategy, but one employed by others in the past), his speed of throw is the only real draw-back I've witnessed in his game, if he can maintain his game against a really slow player or someone slowing down deliberately then there's nothing to stop him apart from himself IMO.
Get out there son, stop hiding your light under a bushell.