Huh, I honestly haven't seen the dynamic that way at all. Amy expresses affection through teasing to everyone, not just Rory. And despite the sometimes awkward tension, Eleven has treated Rory with both respect and affection. I've never got the sense that either of them were devaluing him, didn't want him along, or thought he was in any way useless or in the way.

It reminds me way more of the way I'm actually used to expressing and receiving affection from people I care about (ex: sisabet telling everyone at Vividcon I got cancer because I wanted the attention) than it does anything like the exclusion and mocking Mickey faced.