Thanks for the background info, it helps to understand why things are the way they are.
If having DISA release
updated content is important to you ...
Not specifically, that just makes it easier since the auditors know the DISA STIG and that what they ask about. So long as I have a good profile with sound security practices that I can justify to my ODAA auditor then I'm satisfied. The OSPP profile should fit that purpose well and if I explain it to auditors, I'm 70-80% confident I can get them on board with it.