Thanks for catching this, Udarian.

1. My first reaction was its government data, surely it's public domain? But then I realized it's Florida so all bets are off. But then I looked and data on the Miami-Dade Data Hub are "...made available without copyright, patent, trademark, or trade secret, or similar regulation other than reasonable privacy, security, and privilege restrictions."  https://gis-mdc.opendata.arcgis.com/documents/2b91577ca9fb44a289b6d74ec884fd5b/explore
2. You're right - I toggled through a few satellite sources and must have confused the chronology. It looks like there used to be a parking lot and is now a large building (visible in Bing, under construction in ESRI World Imagery).
3. I didn't realize construction was still ongoing. So I agree adding the trail through the transit center may be premature.

I came across this while editing the East Coast Greenway (FL) relation which was broken here. I'm not local, so can't check out the site in person. What are your thoughts on the best  way forward from here? Options that come to mind include:
1. Revert the change
2. Change attributes either to access=no or highway=construction, construction=bikeway
3. Add a map note asking for local verification.