Quote: jonny the leyther "Agreed, that if reduction in injury is what you want, slowing the game down by reducing subs is the most common sense way of doing it. I still don't think it should happen though.'"
But with 6 subs you are likely to have 4 interchange props each doing a 20min spell, an interchange hooker each doing a half with a final utility player in case of injury or an abysmal performance by a starting player.
This would not slow the game down, it is highly likely to increase the tempo and be much more tactical. The added bonus of reducing injuries is certainly something that could be looked at and possibly a trial of some sorts could be done.