WCIV was stuck with this switch. Albritton bought 33/40 in Tuscaloosa/Anniston, along with the new ABC in Jacksonville, WBSG to grab the ABC affiliation for those markets after New World got WBRC and flipped it to FOX. Part of their agreement was to flip WCIV to ABC, as that was their last NBC in the group.
WCIV definitely has not benefited from it. You already had the 800-pound gorilla of WCSC, They got ABC at pretty much a bottom for that network, while NBC was at the top of its game when it picked up WCBD. Channel 4 had an established anchor team (Jim McElroy, Vanessa Hill), but both left soon after the ABC switch.
They had trouble getting a team, and has always gotten the leftovers from the other Albritton stations. They have been stuck in a deep #3 for most of the time since the switch.
Charleston is one of the strongest CBS markets in the country with Live 5, and almost all of their shows are tops in the market. Even The Early Show, a couple years ago, was near #1. GMA had a few hundred people when they last visited 9 years ago. The Early Show visited after the Charleston fire, and they had to close large parts of downtown.
WCBD was not a well-run station at the switch, but just before it added a 5pm news, and moved Oprah to 4 from 5. They actually beat WCSC in that slot. They still had a quonset hut studio until 2002, but MG upgraded it. They even flirted for #1, but MG fired all their expensive talent and now it is a distant #2. They did get the advantage for the switch.