I'm not 100% sure what you're talking about as I haven't seen construction walls in that queue recently but as far as I heard, Disney really does not want people in the standby line to see the fastpass line moving and if anything, they want to expand that divider wall. Not remove it. Notice all the new rides try and hide their fastpass queues from the standby line (Flight of Passage, Slinky Dog Dash, Millennium Falcon, Seven Dwarfs Mine Train, the new Toy Story Mania queue etc.). They weren't using the indoor portion of the queue of Buzz for a long time and I asked about it because it's the middle of summer and for no apparent reason, they're holding nearly the whole queue outside when there's plenty of room indoors.