I like all of the changes. I like all of the things that challenge simple solutions like "I have a wall, I don't need to worry about anything now."
Doors are fine. Wooden doors too weak? Build out of stone (it's great that the speed of wooden doors is now offset by their weakness, it also makes autodoors more important). Still having problem with things bashing through the doors? Make double-stacked doors. Make sure you have firing points to the sides to harass anything trying to break through. Have multiple layers of defenses. A system of strong points throughout your base. Adopt hit-and-run tactics and a base layout that allows this (helps to deal with being outnumbered).
The idea that the changes now force use to slug it out toe-to-toe is nonsense. Approach things more creatively, definitely. That's not a bad thing.
Doors are fine. Wooden doors too weak? Build out of stone (it's great that the speed of wooden doors is now offset by their weakness, it also makes autodoors more important). Still having problem with things bashing through the doors? Make double-stacked doors. Make sure you have firing points to the sides to harass anything trying to break through. Have multiple layers of defenses. A system of strong points throughout your base. Adopt hit-and-run tactics and a base layout that allows this (helps to deal with being outnumbered).
The idea that the changes now force use to slug it out toe-to-toe is nonsense. Approach things more creatively, definitely. That's not a bad thing.