I think the relationship itself was portrayed to the viewers that there was a connection there, but there are circumstances that prevented them from getting together. Such as their own need to get home to be with where they belonged, and their own emotional entrapment. It's the whole psychology behind John and Aeryn I am fascinated with. We have one ready to declare his love for her, and we have this new ex-peace keeper who had an affair with the other Crighten and couldn't seperate the two in her mind after Tayln-John died.
The final scene at the end when they let loose on everything is what I was hoping for - to finally have some realsm to the relationship.