FWIW, KCKC puts "adult hits" on their RDS.
By all estimates, 102.1 has not been successful in a long, long time. But if KCKC clips a few listeners from Audacy (KZPT, WDAF-FM) to boost the other three stations, then I suppose it has done its job for now. This is a comfort food market; no one is going to tune out KCMO-FM anytime soon. If you're in the car for 15 minutes, you're pretty much guaranteed to hear three winners on KCMO-FM, or KCFX, or K-Love, or the country station of your choice.
I'm not suggesting KCKC try this, but the only thing I can think of, if the cluster's ideal sales target is a 42-year-old woman with a couple of kids in the house, is to do classic pop hits with a 1996-2009(ish) focus. I don't have playlist access, so I'm not sure how much of that KMXV already covers.