Hagoromo said choosing Ashura over Indra resulted in them fighting, choosing both still did that, but WHAT IF, he would have chosen Indra, than what would have happened? Would the cycle end, would there already be peace?
Naruto and Sasuke are not Ashura and Indra.
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They only hold Ashura and Indra chakra's, respectively. That's all. But, imagining that your parallelism could be applied...
Then we must consider the fact that Naruto was the only one, the chosen one, declared as a fitting place for reunion between the beasts. He doesn't have all the beasts inside, and he doesn't try to control them. The cooperation between the transmigrants was never tested, and maybe this path was the one that lend the world as a peaceful place. Sasuke chosen 'revolution', thus sealing his own fate... for defeat.
Why do I say this? This chapter already foreshadowed Sasuke's downfall, because he is trying to force the path of power, the path chosen by Indra in the past, and furthermore, the one who Kaguya took in the beginning, and that took her being to her demise, twice.
I don't see any reason for a better world under Indra having the Sage's legacy.