I felt it more realistic for the trak textures to move along with the doors.
I didn't have to beserk the barons when I tested this on ultra violence, though I should have made the rocket launcher secret more easy to find as the barons were built around the rocket launcher in mind. At the end of the blue bottles next to the rocket launcher platform is a wall switch that raises stairs so the rocket launcher can be accessed. The cacodemons were built around the plasma gun, its easier to go into their area. Not sure why you used the chaingun against the barons instead of the shotgun though. The BFG secret is accessible by a fake wall near the barons in the thumbnail though its pretty subtle.
