I just recently got Piper's companion perk, and am in a relationship with her. Have I basically heard all of her story? I'm considering swapping her for someone else, but if there's more to her story, I'll keep her around. Do I need to keep running with her, or can I pick someone else up?

I ditched her as soon as she gave up the perk. Some do have missions though. i never got one from her and other peoples missions i got before the perk. Cait gave me the perk after her mission while i finished McCready's mission and still havn't gotten the perk.

Alright. Then I'll probably let her go, and pick up someone else. I'm mainly worried that I will miss some more of her backstory if I let her go.