To borrow an excellent term from Edison Research, we now have an "Infinite Dial" because of mobile devices and streaming. We don't need an expanded band.In other words, what solutions would YOU propose to give everyone a fair chance in LA? I vote for an expansion of the FM band of 60-100 Mhz, while skipping the specialty devices at 72Mhz as well as Channel 5.
Expanding a band is a dead issue. People are not buying home radios, and the average car is nearly 12 years old now... so if the new band were introduced, it would take over a decade just to get it available in half of all radios. And to open the band for applications via new FCC rules and to accept and grant applications would take several more years at best.
And your listing of stations includes a whole slew of separate radio markets: San Diego, Tijuana, LA, Riverside/San Bernardino,. Oxnard/Ventura, and Santa Barbara. "LA" is Los Angeles and Orange counties, not any of the separate markets surrounding it.