Compass. XJT is swirling the toilet bowl due to mismanagement and extremely high costs relative to the other regionals. 50 seaters (CRJ and ERJ) are going away over the next few years with no replacements slated. Displacements, downgrades and even furloughs loom on the horizon within a year or two. You will not hold ATL. ATL will most certainly continue to shrink and become more senior. It's already the most senior base on the CRJ side. Junior bases are DTW, IAD, MCI.
Compass will have a fast upgrade because the Delta flow throughs are about to leave. Despite being owned by Trans States, they haven't been bent over yet.