Conor's transformation. He has more bulky muscles than the time he fought Nate Diaz also in welterweight. I speculate that his speed might be affected by the bulk. He might also be stronger, however.
If Conor McGregor keeps on bulking like this then it will be hard for him to cut down at a later time even if he wants the second fight against Khabib and i think he will be going after Jorge Masvidal for the BMF title and so is the reason he is bulking up and then he might even challenge the 170 pound belt and Dana White will make that fight happen because of the huge money they will be making, i am sure he has a plan to fight at 170 pounds on his return and that is going after the BMF belt.
If Conor McGregor will face Khabib again after Conor facing Cerrone and win, I am not expecting anything new. Khabib is a monster, he knows his game so well. Conor is good in standing up, while Khabib is good in grapling, thats not the area of expertise of Conor. Thats where he got into trouble with Nate. He (Conor) needs to bring his A game and add more to his artillery if he plans to face Khabib again.