^ After reviewing the "Preferred Alternative" in the City's study, I'm against the monorail as proposed.
https://www.miamidade.gov/transit/li...rtp-report.pdf
There is no direct monorail connection to Brightline, Metrorail or Tri-Rail. The downtown end terminates at Genting's waterfront property, which is good for them but bad for Miami. The existence of a Metromover connection doesn't mean anyone will use this complicated, convoluted system.
On the Miami Beach end the study DOES call for the line to extend down 5th to Washington, but basically rules out any further extension up Washington because the corridor is protected by National Register designation (not a dealbreaker necessarily but opens the project up to legal challenges). The private proposal for the monorail doesn't include the section down 5th Ave though.
So yeah, kill it. Do a light rail system that has better connections in Miami and better coverage in Miami Beach. The cost estimate is only slightly higher than the monorail but the upside is huge.