You are absolutely right that the Delaware ruling on March 13th was purely procedural as it was a denial of an emergency motion for expedited relief.
The Speed Misconception vs the corporate PR Spin as Management framed the March 13th Delaware hearing as a win for the company.
When in reality the Court simply decided, This is not an emergency. The Court did not rule on the merits of the case (i.e., whether the plaintiff's claims about corporate control are valid). It merely told the parties to proceed through the standard, pace of the regular docket.
Until then the Delaware Court actually ruled is they explicitly refused to interfere with management's ability to operate, signaling that the current board’s control is recognized by the judiciary as sufficient for the company to conduct its business, including the Washington litigation.