Why would the SEC encourage, let alone compel, any company to terminate registration?
In this case, it is likely because the Company's bankruptcy is effectively going to turn all the assets over to the lenders. That would leave the ticker as a zombie only, and by having them agree to terminate registration it will be one less zombie ticker they have to worry about.
Miller and the SEC must have consorted with each other during this process and agreed that if they qualify to cause to voluntarily withdraw so the commission does not have to institute proceedings to revoke. Especially after congress passed the JOBS Act, they moved the goal post to make this significantly easier on the issuer, the SEC has stepped aside. Why not. Saves money.