Interesting. The old power house in the background has since been demolished and I'm sure that Nassau Tower is next. They need to make room for the 3rd track along the ROW.
As of today the Willis Ave crossing is nearing completion. Main Street has been closed permanently and the street in front of Davenport Press (great restaurant BTW), will be one way northbound.
https://lirrexpansion.com/mineola/
Here's Willis Ave recently (looking south) The main line is at the top, Oyster Bay is the curved track. The main line was the last of 7 grade crossings that were converted to overpasses of the 8 total crossings that were eliminated by this project.