KRTH has been and can continue to be a great radio station. From what I'm reading here, is they are backing off from the 90's and focusing on the 80's. That is fine. It certainly is an understandable marketing strategy. I would not discount the best of the 70's, however. Yeah, the target audience may not have been alive during this era, but perhaps they have an appreciation for the era?
I noticed KRTH brought back jingles (a new package) in the last year or so, but the best thing they could do right now is to re-introduce the classic K-Earth package. They would fit with any format modifications and still sound fantastic.
I have always loved K-Earth, and while they have lost their way in recent years, they still have an opportunity to be important when it comes to classic hits. Just put the right ingredients together for the perfect recipe. And stop trying to chase younger demos...it doesn't taste well.