I still cannot believe CVG-MSY got the wack, according to my timetable records, it was still daily on a CRJ-900 when it was ended in 2015. At least they could have done 4-5x/week on a CRJ-700. I very much expect CVG-MSY to be relaunched with a CRJ-700/900 at some point. I have seen rumors for this announcement since late last year (the rumor was a complete reversal of the March 2015 cuts, which includes CVG-MSN/GRR/PIT/RIC/MSY/JAX/SAN/PHX, AUS/LHR have been mentioned as well, though they were cut earlier). While this is probably a bit more flights that DL would consider adding back, I think adding 2 or 3 would be more reasonable for competition against WN. While I have not heard anything about the DL expansion at MSY outside Airliners.net, it seems in line with the recent movements at BOS/CVG/RDU/AUS/MIA/DCA. DL has to have the most point-to-point routes of any US3 airline, and I think it is an interesting strategy that they are using more and more.
Also, DL is bringing back more CRJ-200's previously parked to pick up some flying, not sure how many exactly, but some of these smaller routes should be doable. My understanding is that most will be used to increase frequencies, possibly this could free up some CRJ-700/900's, but I would love to see some older routes resumed. I know at CVG at least, besides CVG-MSN which cited low pax loads, most of the cuts were cited as a result of "pilot shortages", it was not coincidence that G4 added CVG-MSY/JAX less than a month after DL cut them. RDU/CVG-MSY seem like the most likely adds to me.
Next: CMH-BOS, Delta Air Lines E170
A319/320/332, B712/722/732/733/738/739/752/753/763/764/772/773/788, CRJ-100/2/7/9, ERJ-145/75, MD-88/90, S340