I understand what you're saying but it all ends up being very subjective unless you have more concrete standards in place. Do you want only the greats in the HOF or do you want pretty much everybody who meant anything to the sport?
People today don't know shit about Namath. They just go by tall tales and what not. Got my info on the AFL from people who went through it and passed it on to me as a young kid and also from watching documentaries and from reading stuff long before the internet came along. I even remember watching Namath play for several years and even as a kid, I thought he sucked. I can tell you without any doubt FT knew nothing about that era. It's as if he just read it off of Wikipedia or something. I shouldn't have even started with him cause it's as annoying as hell when somebody is pitching something that's so far off base of what actually happened.
As for Namath, you cannot deny he was a key pioneer of the sport as I mentioned from the beginning. But let's be serious, his numbers were bad then and now. In his 13 year career, his team won a playoff game only that 1 single year. They made the playoffs the following year but lost the only game there and never even sniffed the playoffs again. So your left with a QB who had bad numbers, even as compared to his better peers back then and also had a bad Won/Loss record so when people say these players are judged by the body of work in their career, bullshit. Really, if anything, you can only say Namath got in based on that 1 single win that meant so much to the NFL. And if you were to ask Bubba Smith before he died, he'd tell you in no uncertain terms why Namath didn't even deserve credit for that 1 game.
As for Eli, his whole career has been very Cutleresque except for the fact his team won 2 Super Bowls in similar fashion vs the same team. Are 2 SB wins enough to get him in? Add the significance of his surname and there's really no doubt he will get in but really, it's almost like making Jay Cutler a HOF guy. Cutler has a higher career rating than Eli, a much higher completion %, only a slightly higher int% and they both have the same td%. They're like twins separated at birth. The only difference being Eli is much more likeable and has 2 SB rings.