here in Utica, NY. ALL the leagues have gone to all metal. We use a .44 375 Trump Stote, and play on fields that range from 285 to 310. We are allowed to use any metal bat, barring banzai aluminum and titanium (but they allow PST's). We have a 3HR limit and on the good teams its an issue to not use up all the HR's too soon. Metal bats have definitely come a very long way, and alot of them hit every bit as good as top of the line composites. There are still hot shots up the middle and balls that clear the fence by a considerable amount.
So has it been for the best? I surely think so, cuz it takes nearly all the bitching about shaved up sticks out of the game, and other than shaving a PST shell, its just dumb to thin out a metal wall unless you want the bat to crumple immediately. Good hitters are gonna hit it hard regardless of what is in there hands, its the indian, not the arrow. And if other leagues start doing this, it will certainly weed out the boys among the children. Now there are also wood bat leagues around here too, and they use the same ball, and that weeds out the men among the boys and children. VERY few guys can smash a .44 375 out of 300' field.