Dahj's mom scene reminds me of Terminator 2 now that I watch it again, when John Connor called his foster parents. I knew something seemed familiar about it.
Have we discussed the "mom" bit? At first, I felt as you, that this was someone pretending to be her mom for nefarious purposes, most likely the Romulans. But the advice she gave Dahj wasn't nefarious; it was good, to find Picard, to seek help. The Romulans don't seem to be after Picard, otherwise they would have killed him on the rooftop. My guess is that the "mom" is some kind of manifestation of Dahj's own program.