The stitching that connects the pocket to the body of the jeans or just the pocket detailing? The detailing comes off eventually, in fact on some of the extremely distressed washes it's gone/fraying in certain parts. That's kind of part of the RRL "look." But if you're unhappy with it, I'm sure a SA will replace - they've always been good about service when it comes to those things.
No experience with Khakis.
Right, my stitching on my Spring Creeks is almost completely gone and I like it that way, it gives them character. I agree that it's a part of the RRL look. You're supposed to wear the shit out of them. Then where the shit out of them some more.