Sasuke rinnegan jutsu is like a mixture of izanagi and izanami which allow him to control his surrounding at a particular distance.Madara said," Sasuke rinnegan jutsu (time and space manipulation) is limited to certain distant".This explain why Madara tried to ran from the rinnegan jutsu range.
One thing Sasuke could do to make his space time jutsu more OP ,if he used shadow clone jutsu to cover more distant and increase the range of the jutsu.I know people will say ,we never seen Sasuke use shadow clone jutsu but he did againt itachi by making a snake clone and also early in part 1, school exam.Another thing people will say is that Sasuke do not have the chakra reserve for shadow clone plus space time jutsu at the same time.Sasuke have senju dna and senjutsu (demonstrated by black chidori) which will increase his chakra reserve.In addition ,Sasuke also have EMS which make his jutsu spammable as we seen before he had rinnegan (Rinnegan jutsu should be spammable as EMS)
One thing Sasuke could do to make his space time jutsu more OP ,if he used shadow clone jutsu to cover more distant and increase the range of the jutsu.I know people will say ,we never seen Sasuke use shadow clone jutsu but he did againt itachi by making a snake clone and also early in part 1, school exam.Another thing people will say is that Sasuke do not have the chakra reserve for shadow clone plus space time jutsu at the same time.Sasuke have senju dna and senjutsu (demonstrated by black chidori) which will increase his chakra reserve.In addition ,Sasuke also have EMS which make his jutsu spammable as we seen before he had rinnegan (Rinnegan jutsu should be spammable as EMS)