By the 2000s, the NFL had shifted into a passing league so defenses started drafting players smaller & faster to play the pass. I think we are just seeing the opposite happen now. Offenses are countering those speedy defenses w/ power run games and heavy sets. It’s just a constant evolution happening.
What we saw in New York w/ Rodgers was him basically being his own offensive coordinator. Obviously didn’t work out very well. Coaches coach, players play. Peyton Manning is the kind of QB that has his own built in OC.