The implication of Rey’s reply about Luke is that she is considering the realization that Luke could be her next parental figure since her family is never coming back to get her.
I think that Maz days right before that line that the people she’s waiting for, her parents, aren’t coming back that this is the interpretation they were going for.
I think JakeRyan17’s ideas are some of the best for salvaging some consistency out of this trilogy. I’m not a big fan of the light this puts Snoke in for TLJ, but I don’t know of a better solution.