Sasuke and Madara never did any sort of Sage Mode training, there is no way to do Sage Mode without training. Naruto used to turn into frog at first due to no training before.What makes you think that just becouse sasuke body was developed in order to match CM can miraculously already match any sort of senjutsu? the asnwer is he can't same as madara who after absorving hashirama's dna the pigmentation went in to his chest instead of his face.
Or pain who after absorved naruto's sejutsu instead of turning in to a stone he turned a frog made of stone witch goes to show that everybody realy has diferent kinds of senjutsu and that they arent the same.
Nagato turning into stone is again due to never training for Sage Mode, the old frog mentions if the frog transformation goes too far it becomes irreversable and the frog turns to stone.
Sasuke body maybe adapted to senjutsu, but he still need training.
I like it when there was no body vs eyes to be honest, like part 1 and early part 2.