In the chat transcript I found several tags with ~50-100 questions that appeared to be similarly far from "core physics" as observational astronomy is from astrophysics. For that reason I don't think a renaming is needed.
The examples I listed during the chat were: education (100 questions); electric circuits (48 questions), or computational physics (41 questions). The latter two straddle the gap between electrical engineering and the various cs/programming SE's. If there was a teaching SE, the same would be true of the first.