I'll be sorry to see ST go away as the term went back almost 40 years.Yes, no more "GA". Branding is a really hot topic at the moment; there will be a new name encompassing all Operators (probably won't be "ST"; currently it's listed as "Weapon System X" and "Brand X" as a place holder in the documents).
SERE will be staying under AETC and ACC for the time being. TACP as well.