First I will say that I do believe Eli (if he stays healthy) will be in the HOF. I also agree he still needs to do more (needs a large sample size 2-3 more years, or 1 more SB next year will get him in if he retires lol)
I also do agree the game is a bit more pass friendly, but just look at the numbers. And no I am not saying one is better then the other.
Marino was in a very pass happy offense for nearly all of his career. So while he was putting up yards it shouldn't be as surprising. The league in the last decade started heading that way with Peyton leading the way, then Brady, and Brees.
So lets look a bit into Marinos numbers...
Marino had 3 season of 600+ passing attempts
He had 8 seasons of 500+ passing attempts
Plus some mid 400+ passing attempts, and a few injured years.
With all that said he had four 4,000 yard seasons with his best in his second year with the 5,000 yard setting year.
Ints during the start of his career (he only had a great 2nd year season and never repeated it) -
1989 - 22
1988 - 23
1987 - 13
1984 - 17 (his career year)
In his 8th season the ints stayed between 13-17 on average, and in 17 years he finished with 0 SBs