Since Alien Walls has drastically changed in 0.4.0, new possibilities and plans are available. Here's what I have in store for Alien Walls:
Alien Bioconstruct can only be made in assembly machines (The walls and gates can be hand-crafted)
Different wall tiers can be made available (Via research, with different stats. I'm thinking the current wall/gate will be mid-level)
I might fiddle with hybridizing other structures, making it so they can heal over time,but that's a long ways down the road.
What do you guys think?