Sessions also referred to Horowitz by name, in conjunction with this set of investigations.
The second half of p2 and first half of p3 are clinical descriptions of "the system," so use of titles there is natural.
And in closing, Sessions exhorts his recipients to contact him (Sessions) directly.
Rosenstein is not mentioned by name, at all.
Yep. Doesn’t change my conclusion. If DAG had been used in the initial paragraphs, maybe so. Given the title usage prior to DAG, it just doesn’t look that significant to me. I could be wrong. JMHO. YMMV.