I think there are a few things that one needs to consider in the comparison between the two:
1 - Atlanta and Kansas City are VERY different markets. Atlanta is an over-radioed, highly diverse media market with a million frequencies, and a lot more competition. There are many more well-programmed stations going for the same demos that Star is going after. (Q, B98, Power, Fish, Bull, Kicks) Therefor, taking a plug and play approach from another station won't work. You can't take the logo, imaging, position, voice guy, clocks etc. and just stick them on 94.1 in Atlanta and expect the same results. You're up against two well-programmed CHRs (one with a heritage morning show), a big AC, and two well branded country stations.
2 - Star 94 is a station with high "brand awareness" in Atlanta, but poor ratings performance over the last several years. It's the restaurant on your block that everyone knows about, but no one eats dinner there. The station has been so many different iterations of Hot AC and CHR in the last 7 or 8 years that the audience is just confused at this point, and every change goes unnoticed. PDs have focused on the wrong things - changing the voice guy and putting a new logo on the van won't bring thousands of listeners to your station.
3 - Star / Entercom have clearly dumped a lot of resources in to the new morning show and it hasn't paid off. Too much time during the day is spent promoting a morning show that no one is listening to and honestly, just isn't that good. I know Jeff and Jenn were supposed to be the next big Atlanta morning "thing", but in the last several months the morning numbers have fallen lower than they had with Cindy or Drex Cassiday and Tingle. It's hard for a station to succeed when the morning show under performs so dramatically. It'll be interesting to see what the CBS / Entercom merger brings. I don't think this will go on for long.