I disagree. The only reason to allow the ban to remain in place during litigation is that the Supreme Court believes the ATF will win on the merits of the case. This decision tells me that the Justices believe the ATF is within their powers. That tells me that, when this inevitably and eventually reaches the Supreme Court, their will either a.) deny certiorari and let the ban become permanent law, or b.) rule in favor of the ATF.
Additionally, this indicates to me that the Justices have no intention of enforcing the Bruen decision, because the laws requiring serial numbers on firearms is not in keeping with the "text and tradition" of the 2nd Amendment as written at the time of the founding. The wording of the Bruen decision should have been enough to have this law overturned, with or without the separation of powers argument. Indeed, either of those arguments should have been sufficient for an ATF defeat.