Yeah, the tone of voice that they don't have a replacement yet for Delta was evident. At least it seemed that way to me. It sounded like mild frustration at working at progress but ultimately having nothing to show for it yet, as compared to simple futility.
I still hold hope for a link with American, which seems like a great fit for both parties. With American not participating in this round of mergers (at least that's what they say) linking with Jetblue and hopefully Frontier expand AA's reach and penetration.