As a former resident (99-02) of said county, I always thought the changing of the name to “Miami-Dade” was ridiculous. It was at the behest of a County Commission that wanted a consolidated government a la Indianapolis and Nashville. Thankfully, all they got changed was the name.
This reminds me of the consolidated government attempt that occurred her in Knox Co., TN abut 12 years ago. All of the "good government" libs were for it. Then it ran into a fatal double barrier: the blacks of east Knoxville and the whites of exurban west Knox County. The blacks didn't anybody diluting their vote on the Knoxville city council. The exurban whites, your truly included, didn't want to share their checking accounts with the city's "needs." This remarkable inter-racial harmony sank the metro government idea as deeply and decisively as the Yamato was sunk at the end of WWII.