With the industry as it is, such a huge drastic shift in the SWA business model would uproot this company. This was one reason for the language in the new CBA. Company agreed that RJ's would not work here for both cost and space issues and have no reason to add a new aircraft with lesser seats to the fleet. They looked at this before, and it just dosen't fit with this airline and the point to point network.
If the company really wanted to do this down wind, they would not have agreed to the new scope language which prevent's it.
There are plenty of good regionals out there, but unfortunatly, non of them would operate a RJ division here. It would be internal if it were to happen flown by current and future SWA pilots.