sasuke might have gained the power to spam a version of insangi/ insanmi and the lost is a ring of tomoe per jutsu eye like tomoe check the spoiler pics he used his tech three times and each time he loses 3 tomoe until he was left with regular rinnigan my guess is in order to escape the attack...
Izanami can work on madara but not for long like on kabuto sasuke may only use that tech to buy a few seconds to extract the senjutsu chakara from madara madara ran to get the senjustu chakara from hish knowing he would be at a disadvantage if he was without his eyes madara's rinnegan tech have...
what happens to uchiha eyes do u loose the light if u use those techs or do u evolve to rinnegan because you have senju dna and ems Ems is suppose to never loose light
I think its likely that sasuke and orochimaru will become one being bringing forth a new sage of six paths half uchiha/senju
i think if sasuke continues the destroy konoha path the only one who could stop him would be harashima but even edo harashima could not win against an half uchiha have...