Briscoe's career has really fizzled out and he probably shouldn't have been re-signed last time round, and never used as a centre. Those were club decisions and shouldn't be held against him.
His highlights reel is far more than the 5 tries at Wembley - he consistently did well in big games (nine tries in five finals) and is one of very few players with three Challenge Cup wins with Leeds. I wish him all the best.