My understanding is there are potentially hundreds of claimants in England and Wales alone. They're trying to build a class action like the ex-NFL players did in the states and my view is that a major reason for publicising this is to get more potential claimants on board. I 'm a lawyer so understand that the legal points are complex, especially on causation and what exactly the relevant bodies knew, but if it gets off the ground it'll be huge news. The NFL settlement is currently estimated to be north of $1 Billion so that tells you how significant this could be.
Personally (and it's only my opinion) I would be surprised if there wasn't a case to answer. Players have life changing brain injuries and the consensus, on the podcasts I've listened to with players of that era, and from what I've read at least, is that nobody involved in the game is surprised. Lots of them have admitted on these podcasts how scared they are about the future and the symptoms they already exhibit. If (again, as I have heard said on a podcast by someone taking a similar claim) the data on concussion was available and well know in the 70's, questions will be asked. The game has been pro since the mid 90's and the players we're talking about here are only mid 30's. The culture was, it seems that it's a badge of honour to get knocked out cold and just carry on.
I take your point on scrum caps, but perhaps the thinking is that if people perceive they have protection they'll be more reckless? Also, I'm not sure what level of protection that offers from hits, as opposed to cuts or swollen ears? Boxers wear gloves and they still end up with these types of issues. That said, any benefit is a benefit.
Clearly the game can only be made safe to a point since it's a contact sport. It's shocking though to see a man 35 years old who's not allowed to look after his kids because he can't be trusted due to his injuries. Some of the CTE stories in the states of ex NFL players are really shocking too.