OKW: they still have flak bunkers as part of their base HQ defense layout.
USF: on top of having a really stupid (gameplay wise) base layout, they have for some reason MG bunkers on it which only works on certain maps depending orientation.
Both of these matter irritate me.
The flak guns have 360 degree arc and can damage light vehicles. Seems like a random advantage to bestow one faction and now another.
I think all factions should just get the standard bunker at the borders of the base sector.