Personally, I think a step backwards.  Football is inherently physical and often violent.  One of the reasons it appeals to us, although many will deny.  The players need to be attuned to this, at the body or muscle memory level, and to me, once a week in pads does not seem onerous.  What's next: Canadian Flag Football League ?  Will the NHL adopt ringette for practice ?

As for the head injury issue, you step onto the field, or ice, you assume the risk.  And these types of injuries can and do occur far from competition: slipping in the shower/tub, stumble on the stairs, for example.  Do we have figure skaters wear head gear ?  Don't even mention boxing or ultimate fighting.