This ties is with my view that we should move to a pool of available rolling subs. In the event of injury player rolls off, gets treatment, while a replacement rolls on and play is continuous. In the event of head or other serious injury the rolling sub pool could be supplemented by substitution.
The modern rules are highly compatible with preventing real contact in the tackle and benefitting the team in possession with the ball on the ground. So we might as well go to a new offence of head ball, to complement the hand ball rule (that still needs sorting out). Defenders would have to learn to take the ball on the chest, or the ground. It would be fun. "But we head the ball, it's just a thing that we do, you can't change that.". Like a fair barge of the keeper into the net, which we don't do any more to the most protected position on the pitch.
It's football, not head ball. i would not have a problem with this.
This is not satire.