No we don’t need it and no that can’t actually work. You can’t have a player potential kick a goal while the incident is being investigated as that is amateur hour at its finest.Oh yes you can...main umpire hears decision (from 3rd umpire), next stoppage Red Card issued (shown on scoreboard).
Play resumes after stoppage.
How many times a game will it happen...rarely.
But we need it.
What purpose does a red card serve, it won’t be a deterrent for players it will just slow down the game.