We haven't even seen much of what his EMS can do, I doubt Sasuke would ever master it before the war is over. Besides don't you have to be a special kinda blood line for the Rinnegan?
Yah he dosent itachi has owned enough thx to him were here now other wise everyon else would be still fightign edos and we wouldnt have got the naruhina moment Btw did they kill at the white zetsus? and where is black zetsu >.<