I don't think you are right. Our main problem at Delta right now is too many RJs, period. We already dumped our unprofitable fleets, consisting of 737-200s, 737-300s, and 767-200s. What we have today is a pretty efficient fleet, fitting almost every niche, except a 100 seater. Our smallest plane (not including the new 737-700s we will start getting in July) currently is the MD88, and they are more advanced than any MD80 out there, and have low lease rates thanks to BK.
NWA, on the otherhand, has a 100 seater that could be used on some ATL routes, and the only liability I see over there is the older 742s, which even UPS dumped. Could our management dump the DC9s? Sure, but they have said they would like a 100 seater, and we can't get our hands on any right now---even E190s are out of reach for awhile. The 742s could be replaced with NWA 744s eventually, which are proven to be better cargo haulers----even World Airways and Kalitta have gotten a couple recently. The smaller hubs that could take a hit are not very "mainline intensive"---meaning their possible closures would not be a very large hit on mainline (DL has 56 daily mainline flights out of CVG---that's it, MEM is similar). The other hubs will probably stay about the same size, with LAX growing. I don't see much downsizing, instead with an emphasis on growing the INTL side and reducing RJs on the domestic, and maybe even adding some MD90s in a year or so.
Bye Bye--General Lee