I think most destinations that are downgraded in frequency will be okay... I think BNA will probably be picked up by WN and will thus have 2 carriers on the route.. And the fares will be better for BNA with WN.

I think RDU is going to get screwed the most cause there will only be one carrier (nobody really sounds like they will offer RDU-DCA) and fares are already ridiculous on the flights (>$460)... So with no competition, I fear they may try to raise the price more...