If you really want to improve RL, have no more than 4 subs who you can use only once each.
Oh yeah, and whilst we're at it, let's return to the 5m rule, contested scrums, the right to steal the ball in every tackle, encourage a bit of biff, and let's return the game to how it was in the olden days when it was a skilful, exciting, game.
Can you tell that I've been watching some old tapes and dvd's and have been reminded of how much better the game used to be