The quantity and extent of
injuries seems to get worse every year. An unofficial count puts the number of consussions this season so far (and we're not even halfway through) at 46. And long-term health data indicates most NFL players will end up with long-term health problems and shortened lives (and not just the ones with brain damage from concussions). Being party to that weighs on the conscience more heavily each season.
Football is the most telegenic sport out there [while porn is at the front of the adoption curve for many entertainment-related technologies, I think football was the driver behind early adoption of HDTV in the US], but I'm not sure it can be saved. Size, speed, and specialization have increased to the point that it's unlikely any rule changes or further equipment development will make any difference. In the mid-80s, "the fridge" was a novelty because he was over 300 pounds. Today Chicago has at least 11 players on the roster over 300 lbs, and that's typical, if not slightly small, for NFL teams. And the big guys have gotten faster. The big guys are the ones who can barely walk by age 50 with neck, spine, hip, and joint injuries. The smaller guys are concussing themselves into permanent brain damage. Players like to puff themselves up with blabber about it being a man's game and all. Now that I'm older, and a dad, this comes off as youthful bravado, and I can't help wondering how much strut the same guys will have a decade or two after playing, when walking properly or living without pain on a daily basis might be the biggest challenge.
What can fix it? Better equipment won't do it. Some rules changes would help (e.g. eliminating the 3-point stance). The only real solution is to get rid of the protective equipment. The consequence of the equipment has been greater injuries. (Rugby has vastly fewer injuries than the NFL. It's not as telegenic, but it's close enough to football in some aspects to be instructive. And yes, they play all-out in a rough, manly way despite there being rules about what types of tackles are dangerous and disallowed.) But moving away from a technology-based solution is so un-American that this will never happen.