He was younger vs DC, but Jon Jones said he feels better now due to getting way more techniques and ""mastering"" MMA in terms of cage control, distance management, styles... In the 3 years he said he took the training more seriously than ever.
And nah, I doubt Jon Jones had any PEDs favoring him in his big matches back then. If he did, he wouldn't be willing to fight Ngannou (he was willing, as was Ngannou, but the UFC fucked up on it and it seemed like one was avoiding each other which isn't true... They just wanted more compensations as it's fair for a fight of that caliber), he wouldn't be willing to fight someone like Alex Poatan rn... He's getting ready to retire because he knows he can't push too much due to CTE, but as his last fight, his willingness to fight someone like Alex Pereira, suggesting doing that on LHW even, same Alex who destroyed Prochazka... And is special to the point he picks things so quickly that Glover himself said he often loses to Alex Pereira in grappling... It means Jon Jones is that good imo, the PEDs things were seen once in the actual fight he had --- vs DC 2 --- and it was never confirmed whether that offered him an advantage... We don't know at all.
Khabib chalked JJ's lackluster performance vs Thiago and Reyes due to him being unmotivated in his career, due to the lack of a big prospect that would make him as willing to study the fighter and prepare as hard as he does... Which to me matters most than any opinion from non-mma fighters, let alone someone like Khabib.... Plus Khabib's father saying JJ is undoubtedly #1 when it comes to fighting... That he has a talent from God, and that he doesn't believe there is anyone in HW who could beat him --- he said one guy there (likely Ngannou) could raise some questions, but that to him, Jon Jones would dominate the HW as when it comes to fighting only, Jon Jones is #1 --- Khabib's own father.
It can't be denied....