It's not earth-shattering for theory, I can tell you that for sure. If you read the citations of the paper, you'll find that Das, Nöth and Dürr already proposed

It's not earth-shattering for theory, I can tell you that for sure. If you read the citations of the paper, you'll find that Das, Nöth and Dürr already proposed something similar in 2019 which was published in Phys. Rev. A, one of the most respected journals. What these authors are doing is basically to propose a refined (and possibly more general) experimental setup. Whether this actually works out in practice, or even represents a particularly good way to go about it, is beyond my fluency in this field; I would guess the practical effect is incremental at best.