This is what KILLS us at the bottom, and makes all this hiring and retiring meaningless to the guys already here and in the bottom third, as far as advancement goes: all the upward movement is stopped via "no backfilling".
From the AE award info:
744 – With the news of the four 744 retirements in 2014 we will not backfill up to 10 Captains and 10 First Officers on this AE
777 – ...we will draw down the DTW-777 categories as pilots bid off and we may post DTW-777 displacements in 2015....We will not backfill up to 5 DTW Captain and DTW F/O positions.
330 – ...We will not backfill up to 15 DTW-330 F/Os on this AE.
765 – ...We will not backfill up to a total of 8 Captains and 8 F/Os on this bid.
7ER – ...At this time, we are not adding Captains and may not backfill DTW and MSP as Captains bid off. ...We will not backfill up to 10 DTW F/Os.
73N – ...We will not backfill up to 15 CVG Captain and 15 CVG First Officer pilots.
320 – ...We may not backfill DTW and MSP Captains and DTW and MSP First Officers.
M88 –...We will not backfill up to 10 CVG Captains and 10 CVG Frist Officers.

So there you have it in a nutshell, all the "openings" for Capts will be MORE THAN DESTROYED for junior advancement, by "not backfilling". Just one more in a long line of AEs that look good on the surface, and guys will come on here and post "look at all the CAPT positions Delta added!", but the details show more CAPT positions deleted via "not backfilling".

Meh, it is what it is, just getting this out there before some cheerleader gets on here telling us how great this is and how many CAPT positions we're getting...