Rugby regularly is voted as rhe most boring team sport. WR has wanted to change it and introduced various tricks in order to introduce suspensful events.
Like a ref reviewing a try action that could be judged live. It brings undetermination, the crowd has seen a try. Yet the ref is reviewing. People hold their breath, will the ref confirm or infirm. Works in the opposite too.
Trick like that to make unsuspenseful events suspenseful.
The postponed red card is one of them. Once the hosts are used to it, they will manage the countdown. 8 minutes, 5 minutes, 2 minutes, final decision.
It brings suspension.
Another major benefit: it pushes decision making behind the scenes. Up to now, WR made a show of refs explaining the decision. Leaving the door open to opacity, refs are able to settle deals with no concern.
No longer a ref is exposed with lack of arguments, it is done behind close doors.
