There’s only one solution and that’s for managers to instruct their players that it is one step too far as far as gamesmanship is concerned and is putting their fellow pros at risk when they do actually have a serious injury.
But they won’t obviously. In fact the first thing they’ll do if the law does change is to immediately start working on a way to exploit it.
You can’t put it on the officials. They’re not doctors. And even if they were, sometimes the most serious injuries look totally innocuous to start with.
The LMA and PFA should be working together and sending out the message that it’s unacceptable but I doubt that’s going to happen either.