Personally, I think we are way past the point where SD will make any major changes to any of the maps. It seems like they are trying to improve them with as little effort as possible (cost efficient).
All the same, the map frustrates me so I figured I’d throw out some ideas for discussion regarding the most linear map in the game.
Rather than simply drawing overhead routes, I will try to provide some pictures to help you visualize it a little better - This will be lengthy.
Looking at the map overview, there seems to be a lot of unused space. The 3 highlighted routes are what I am going suggest SD open up to make this map less linear.
1st Route: A flanking route for first phase attackers. This will help take some focus off the EV, allowing for an easier/quicker build and stop everyone from funneling into the same area.