If you jump on top of the console to the left of the objective there as the rocket trooper, crouch and jet backwards you can go through the wall there into the upside down. There are places you can then fire at people in that ice tunnel. Not that I do that much or at all even.
It's fun going back and watching this, that ATAT is my favorite part, and I still play GA, just in hopes to play as the ATAT on Endor. It does amaze me that it's so buggy. When the orbital strike doesn't go, or when it shows the orbital strike icon, but you are still firing your primary. You can also get stuck where you cannot shoot your gun after an orbital, but then sometimes you get to send a second orbital strike. I went back an played WA on BF 2015, and the ATAT isn't buggy at all, you can call an orbital strike without issues, but of course you don't get an added 15 seconds for every kill, so it's always too short.
