Rey never knows the other Jedi. I think personal works way better after Luke just told a personal story about him and Leia.
She tries to reach out to them in the beginning of the movie, we then get a payoff at the end with all the jedi. I like it that way.
Does that moment need foreshadowing though? I think if that the ghosts were in the actual movie it would work better without the foreshadowing. Maybe that’s just me though…