DTW-APN appears to have been swapped back to a CR7.

If you try to look up DTW-ESC on Delta's website, it shows sold out (maybe it's overbooked? Or maybe the site bugs out because it's an aircraft type no longer in the system?) and the Details and Seats links are broken in that they're not clickable. The Flight Status page, although buggy, confirms it's just "CRJ"