If Jon fought Daniel today, would it be like their first fight? I speculate Daniel to be the better fighter today and Jon Jones to be not as good as before. He might not come back to where he was as a dominant force in light heavyweight.
Daniel is getting older and he has not improved a lot as Jon Jones commented and injuries is a struggling him for a very long time,Jones is younger and is in the best shape possible and you really cannot judge him by the fight against OSP,he will defeat DC once against and claim his belt and the division is not that strong like it used to be in the past.