I think we need to go with a youth policy.
If you look back at the Roosters in 2011 went on a slide. They made the GF the year before, then Carney walked out on the club during the season, big name players were moved on and by 2012 they were contending for a wooden spoon and the coach was sacked. They had the youngest playing roster in the league. From memory all players (bar Mini) were 23 or younger.
Flash forward a couple of seasons and the likes of Cordner, Guerra, RTS, Tupou, and Friend, were no longer up and comers, they were established first graders with premiership rings. The situation continues with guys like Napa, Evans, Lui, and Taukeiaho coming into grade as a fearsome crop of young forwards.
The long way is the short way. A little bit of pain now to build a team that will challenge in 3-4 years time, is better than stocking up on middle of the road types that will scrape into the 8 here and there without ever amounting to anything spectacular.
I don't think we need to move our experienced players on just yet, but I think Mason is definitely in his final year, and Killer, Matai, and Ballin should realistically only go around again next season before calling it a day; the dynamism is dropping away. Every year I think the NRL becomes more of a young persons game. These kids coming through are just so powerful, fast, and athletic, that the older boys struggle to keep up.