Buildings have been under review for years. The initial problem was when I was combining BattleForce and Total Warfare to create the draft to the AS rulebook. BattleForce already had building rules, so I used them as is.
However, in BF, a single "hex" is seven TW hexes. So a BF building hex is actually 7 TW building hexes. Alpha Strike doesn't use the same size (a unit is a lance, hex is 7 TW hexes, etc) that BF does, but the building were still being treated as BF buildings. AS buildings were as tough or tougher than an Atlas. A light building in TW has a max CF of 15. It can take 15 points of damage. That's only a half point of armor for AS. Giving it 5 was the equivalent of CF 50.
In addition, there was a conflict with how to convert mobile bases with CF. The same CF mobile base had much less AS armor than the same CF building. Though they were supposed to be equivalent. When somebody asked about converting a constructing building, with armor and weapons, we had nowhere to point them to that made any sense. So I put errata to fix my error.
However, we had several people point out that, in play, many people use larger buildings for AS. They didn't want to have to divide a 6" radius building into 2" radius buildings. What happens when you destroy a 2" radius building but your "terrain" is a single piece? So the errata was withdrawn while we reconsidered it.
The compromise was to offer an option for large buildings, with 6"+ radius that had higher CF ratings to represent the common larger terrain pieces in AS for buildings.
Note that you can add armor to buildings on top of its CF rating. That gets into construction. But at least those rules should work now that we've fixed buildings CF conversion. For every 30 points of armor you add to a building (round normal), you can add a point of AS armor to the building. You'd have to check...TO I think to see what the max armor limits are for buildings?
