All of the local RTN feeds (including WSB-DT 2.2) are switched out of Equity's "CASH" hub in Little Rock, AR. It is a centralized MC that has the capability of switching hundreds of stations. The technology they are using must compress the signal heavily to get as many feeds onto one satellite transponder as possible (which is how it is delivered to the local stations).
Whenever WSB-TV gets around to inserting local programming onto 2.2 from their 1601 West Peachtree Street studios, there should be a day and night difference in picture quality.