I'd like to see a controlled test comparing head injuries (or just impact forces) with these configurations:
1. Normal hard plastic helmets and the currently trendy small shoulder pads
2. Soft padded helmets and small shoulder pads
3. Normal hard plastic helmets and "real" shoulder pads (like we wore in the '70s through the '90s)
4. Soft padded helmets and big shoulder pads.
One problem is that helmets have gotten bigger and bigger, in an attempt to provide more cushion against impacts. But between that and the "Nike" trend of smaller shoulder pads, now there's practically no surface area for the shoulder pads to make contact without helmet contact. You're basically experiencing head contact on every tackle. Most of us learned to tackle with our head in front of the ball carrier, but with the shoulder pads taking the brunt of the impact.