From reading many posts on the maps, it seems that many people do not like FAO Fortress, but don't really elaborate why.
My reason is because in a game where not many people even attempt teamwork, FAO Fortress seems to compound this issue even further for some reason. It just turns out to be a glorified chicken coop with people running around with no real aim.
I also think the capture points are too close together and the map is too open for these short distances.
No matter what team I am with, or who we are opposing, this map just never plays well...