Quote: Andy Gilder "I can't see teams using two out of their eight interchanges to take off and then bring back their starting dummy halves, leaving them just six for the big men in the forwards. Particularly not in the height of summer.'"
If you can get 20 mins out of your props you can get through them in 4 interchanges.
Clever use of your subs and 4 is a decent number to play with for your second rowers/hookers/backs.
The issue would trying to do it would come with injuries maybe taking a few players out and messing up your rotation.
I actually think that might be an issue with the change as a whole and I think we need to keep an eye on how it works around injuries because we need to avoid A) players being left on when injured and B) a couple of injuries destroying the competitive aspect of a game