This is gonna sound weird to people, but sometimes less is MORE in regards to frame rate.
At 60fps, you will notice more flaws with the animations and the game feels more "gamey" and looks less filmic.
Yes, I am a gamer who prefers 30fps for these types of games.
I understand Call of Duty and Rocket League being 60fps for that arcade-like gameplay, but leave it out of our adventure games.
60fps doesn't look more "realistic" to me in fact it makes the game look cheesy to me even if the graphics are good.
It could be in part that when I see a game running in 60fps, it reminds me that the graphics are not as good as they could be. They could turn the visuals up higher and give us a better overall presentation and even better physics or destruction at 30fps instead of a watered down 60fps game.
No matter how fast the hardware gets, you can ALWAYS do more with TWICE the amount of render time with 30fps over 60fps. ALWAYS and that's never going to change.
The entire reason they are doing these games at 60 is because they have the leeway, they are 7th gen games after all even enhanced.
What your saying would only apply if they were making a game from ground up built to take full advantage of the PS4's power, in which case we have UC4.