Hmm, how much does the SoCon need CoC? Let's see the Pomeroy rankings of the conference 7 years before and 7 years after they left:
Before: 18, 13, 25, 19, 20, 26, 28
After: 30, 25, 19, 14, 22, 13, 15
That #13 in the "before" list is when Davidson went to the Elite Eight.
In the past 20 years, CoC has been in the Pomeroy top 100 three times, to the NCAA tournament one time, and zero NCAA wins. They are not a great program by any objective measure. Adding more teams dilutes the payout SoCon members get from the NCAA. They aren't particularly close to anyone except Citadel, and aren't even rivals with them.
Basically, there are zero positives to adding back CoC, with I guess the slight exception that they are good at baseball still. Regardless, they aren't coming back anytime soon, if ever. Even if someone leaves (e.g., VMI), I doubt CoC would be at the top of the list of targets. They made an idiotic decision and I'm perfectly content to see them continue to flounder.