La Preciosa didn’t work the first time, what makes you think it’ll work again?
"La Preciosa" in Dallas did not work because of two things: first, the originators of the format, Recuerdo, at HBC (Univision now) put the "real" version of the format on first. Second, the local Clear Channel PD modified the format and tried to make it more contemporary and made things even worse.
The "La Preciosa" national PD had the idea that more was always better. They had over 2,000 songs on the playlist. Recuerdo was highly researched with quarterly tests split each time between two different markets and showed about 800 playable songs with perhaps another 100-120 usable as fill. So "La Preciosa" was playing about two-thirds stiffs and duds and that is why Clear Channel dropped the format in all the larger markets where they were up against Recuerdo.
In any case, the format, whoever did it, was dependent on 60's and 70's music. While a lot of music was multi-generational among Mexican origin 25 to 49 year old Hispanics 25 years ago, that broadness does not apply to the last decade where age-based divisions are now more apparent. Further, the core of Recuerdo was ballads and romantic Ranchera music, and both of those genres have been in free-fall decline for the last 35-40 years.
Recuerdo (and all its imitators) was a much younger version of "Music of Your Life" and it is now, after a quarter century, old. Really old. As the co-creator of that format (which was not copied from Mexico) along with Amalia González, I have to accept that it was good for nearly two decades but is now past it prime.