Well, that sucks.
Literally every alpha since 8 when we started, we fought the horde. We never ever hid from the horde, the horde is like, half the point of the whole game.
Every time we find a base that works to let us ACTIVELY fight the horde, but without leaving us completely vulnerable to be wrecked, the devs screw it up in the next alpha.
We're not going to run around during the BMH, we need somewhere to stand that lets us be *relatively* safe while we fight. Even when we were using the wedge walkways, we still got spit, vultures, and spider zombies hitting us. I don't want to build mazes. I don't want to build 8000 dart traps and make zombies walk a gauntlet while we sit unharmed, but THOSE are the bases that somehow the Pimps think are ok.
Every alpha we end up going back to the totally boring "solid square base with a filled-in bottom, spikes and a bar overhang, and turrets." This is the ONLY base which has continued to work through each and every alpha.
It's boring. But apparently that's the base they want us to build, unless we want to just make a death chute with dart traps and completely avoid fighting them.