Would this mean the SEC is barred from re-filing the $420 lawsuit? If yes then I agree that would be an outcome Elon/Tesla (and shareholders) would be happy with.
If not then I don't think Elon would want the settlement to be invalidated - the SEC should be held to what they negotiated.
Here I'm assuming that Elon's motion to allow settlement negotiation details into evidence are beneficial to their position, i.e. that the following assertion is true:
"Mr. Musk would like to address the SEC’s unsupported assertions and submit
documentation reflecting the negotiation history between the SEC and Mr. Musk and Tesla, which undermines the newly-presented interpretation the SEC sets forth in its Reply."
(I suppose that's actually true, not just zealous advocacy by defense lawyers. Should that evidence be submitted without seal we'll be able to judge that.)