All this discussion about metal vs wood and the various legal actions makes for some very good reading and very spirited at times. !
Personally, I hate to see such legal actions playing out and probably have impact up and down the line (t-ball to college that is) but at the older age levels something needs to happen to help protect players at most risk. I will not venture a position on the outcome here.
As to PG's question I would like to add a clarification to the point. It seems to me that in little league (12U) metal bats put more balls in play which is more fun for everyone. Dinks with a metal bat become hits where they would probably be an out with a wood bat; that is if the play is made without an error. Up to this age kids don't seem strong enough to really put enough on the ball to really hurt a kid in the field except for maybe the pitcher. At 46 feet the kid that barely makes the age cutoff for 12u could possibly put enough behind the ball to catch a pitcher in the head or chest.
I am struggling with whether 13u, 14u and 15u is better with wood or metal. I say metal because of the same reason as little league, it puts more balls into play and makes it more fun for everyone, except maybe the pitcher that keeps giving up hits when they might be outs with wood.
IMHO, I see the real battle for metal vs wood is for 16u up through the college level. I believe most of the kids that have a desire to keep playing will do so regardless of which kind of bat is used. This is also the point where kids are developing enough power to accelerate the ball towards the pitcher regardless of metal or wood. I prefer wood because I am too old to have played with metal and I like the sound better.
IMO we should look at how to better protect the pitcher. While others on the field are at risk, the pitcher seems to be exposed to the most risk. Well, I guess the bases coaches are also at risk but they are wearing helmets at the college level now and will likely affect high school base coaches too. To me I see no difference in the ability of those strongest batters to hit the ball hard enough whether its wood or metal. Even if you are not the strongest batter; you hit the sweat spot with a high velocity swing line drive and the pitcher is the one with the most risk to get hurt.
I know in little league pitchers are wearing a chest protector and I've also seen some wearing a helmet. I'm not suggesting that older pitchers do this as well, but it seems something could be developed to reduce the risk to the ones at most risk. Heck, I can't even get my son to wear a cup while on the mound. I don't see him wearing a "protector" on the other head either. But something should be available for them if they want it. Make it mandatory? That is the only way most would wear it!