There aren't any pictures yet to show this, but the Hierarchy's Walkers are now functioning with the AI. This was not accomplished through LUA, but rather through giving the AI access to an invisible factory object that can build every Hierarchy unit and upgrade. The player cannot access this structure, nor can the AI build a unit from it unless the corresponding walker is alive.
This is a major step in taking the mod in the right direction, but there are still a couple bugs in the Hierarchy (such as charging the enemy with the units which are supposed to be valuable factories).
With this most recent development, I hope that we'll be posting updates much more frequently!