One thing I really like about this map is the palette door entrance you have to the garage. People have been struggling on how to handle this, and I think you have found the best solution for it. A few things that I thought could be improved upon were the medical tent and the wall floors you have placed. I think if you took a double open box, turned it upside down and
merged it into the ground, it would almost perfectly replicate the medical tent from Halo 2, and you wouldn't need to use those bridges you're currently using. The wall floors seem to be uneven with the boxes and create a little jumping effect when you need to walk over them. I found that to get the correct height with these walls that I needed to stack a dumpster sideways, and then place a door directly on top of it. Then if you place the wall panel directly on the door it should give you nearly the same height as the boxes and will help create a smoother transition between the two.