I think 8p could also mean one partner is focusing on work or other practical matters, so the relationship is on the back burner.
Another possibility is that the relationship is going to require some serious effort. Which is not a bad thing - anything worthwhile requires effort. I think sometimes people get so caught up in the hearts and flowers, though, that they forget relationships, like any other real world thing, require maintenance and practice.
Finally, 8p is also about prudence. It suggests the querent is approaching this relationship cautiously, and may even be in it because it's a safe match or something.