Whatever Metro and the LSCR decide to do with the light, dark, and front side trails, I hope they realize that today's bike community will really only accept that the present trail network of both authorized and unsanctioned trails will form the baseline trail network for the future. Any effort to pull a Hangman or Sack Shifter move on pretty much anything up there won't stick with riders these days. The multiple (formerly) loam lines around CBC are evidence of what modern bikes and brakes can do. Close a trail and a new one opens 10 feet away after 3 people choose a new line.
If they're going to put paid muni workers in the forest, they would be wise to focus their efforts on improving the places they want us to ride rather than trying to close off areas they don't want riders to go. That just won't work anymore. It would be wise for the NSMBA to tell them as much, in a non-confrontational way, of course.