I have enjoyed watching just about every minute of Semi's path to the NRL. He still isn't a finished product but his start to the 2014 season has been phenomenal. Willie Tonga also deserves fair credit for giving him plenty of possession with the time and space he needs to play with.
Radradra, along with Terepo are both positive products of development with a eye for the longer road to the NRL. Both spent an appropriate time in the NSW Cup after graduating from the NYC before receiving exposure to the NRL. Neither are complete players yet by any means but the time spent at Wenty saw them as physically prepared for first-grade as you are ever likely to be.
Joseph Ualesi (1 NRL game) and Daniel Alvaro are the next two internal talents (although Alvaro hails from the Broncos originally) who along with Brendan Santi look to be treading this path next although I wouldn't be shocked if Ualesi comes into calculations from next week with the injury to Ben Smith.
Obviously there are times when exceptions will sidestep the tiered development path. Kelepi Tanginoa and Junior Paulo are two that did so due to a combination of desperation and sheer physical readiness beyond their age. Exceptions will always hopefully exist in our system, which club doesn't want the next Jarryd Hayne or Luke Brooks forcing their selection at the age of ~18 due to talent and form?
The key for Parramatta is convincing the talented but unready graduates of the NYC to progress to Wenty and then the NRL. Succession planning like such leaves all three primary grades strong, ideally fostering the winning attitude we all want while applying positive pressure in the competition for spots.