Nothing politically correct about calling a Church by its actual name nor does doing so imply one agrees with its beliefs. It does if you deny your Church's beliefs in giving its name to another.
That doesn't explain why your Orthodox forebears started using the term "*niat" in the first place.
The argument that the usage of "*niat/Non-*niat" was originally neutral doesn't work, b/c the usage was not
originally neutral. Defining "*niat" to mean those Eastern Churches who are united to Rome, and "Non-*niat" to mean the Nestorians, the Oriental Orthodox, and the Eastern Orthodox, clearly expresses our p.o.v. not yours. (Conversely, if "*niat" had been defined to mean the Eastern Orthodox Communion, and if "Non-*niat" had been defined to mean the Nestorians, the Oriental Orthodox, and the Eastern Catholics, then that would express your p.o.v. not ours.)