Actually, the only location the ATRs are essential is in the Carribbean where some of the runways can't support the jets. Other than that all routes out of DFW and other bases are easily covered by the ERJs.
Just a few examples of traditional prop routes now flown by jets out of DFW: ACT, TYR, and ABI.

It is has already been decided that the ATRs and ERJ 140/135s will be parked. ATR guys will be displaced over to the jets...but under the current proposed TA the pay will continue being at ATR rates.

More importantly, the 145s and CRJs that do remain will be owned by AA who can transfer them (without us) to any company they want. Don't be surprised to see the words, "operated by....." on our aircraft in the near future....