This is a list I made with flaws (based on Alliance BG farming from what I've seen).
Arathi Basin - All bots atm go straight to stables when the BG starts and all of them try to cap the flag. After the flag is capped all bots are facing away from the flag and standing there for a minute or 2. After 2 minutes have passed, all of the bots mount up at the exact same time and move towards Lumber Mill. None of them stays at stables to protect the base. Once at Lumber Mill they all gank enemy players while in some cases the flag is all free and it can easily be caped due to the distraction of the enemy players being ganked. Bots don't defend and take bases, it was horrible to watch the BG with so many BGbuddy users making the BG fail over and over again by just mindless ganking and forget the purpose/tactic of the BG.
Warsong Gulch - Another battleground that is merely based on mid/honor farming. I've seen my (and other's) bot just gank it's way around while team mates try to cap the flag and yell for aid. This ofcourse gets ignored cause we're bots! After our team mate is dead, the enery caps the flag. Voila...You get awnsers like: "Why don't you tards L2P etc". It just pisses people off. I wish the WSG bot had a mechanic that if will follow the team flag carrier and help it. Or that the bot can actually runs up to the base and get the flag himself and try to cap it. Using CC and PvP abilities to avoid enemy players.
Eye of the Storm - This BG is just one big drama. The bots run up to the Mage Tower and just stand there untill it's taken. Once it's taken they all run to the middle to start the honor farming. No other bases are being taken or protected. Also once the bot desides to return to Mage Tower it's already taken by 4-5 enemy players. The bot is not wise enough to know that jumping into a group of 4-5 PvP geared players (solo) is fatal. So within 3 seconds my bot is dead. So after being ressed the bot buffs up and starts the farm fest again untill we finally lose the BG.
Twin Peaks - Twin Peaks can be compared with WSG. It's basicaly the same tactic based BG. The bots just farms honor in the middle while the enemy players cap their flags one by one. If our team mate manages to get a flag, this gets ignored and eventually he dies. Another lost BG.
Alterac Valley - The Alliance somehow win this BG 9 out of 10 times. So that's not really something to complain about. But what does bother me is the strange path the bots take to get to the mini-boss. This path is very unusual and if you see 15 people do it, it's just super suspicious. The bots go inside and assist killing the mini boss. And continue their ways. It often happens that when the bots die and end up in the Alliance base again, they will once again run towards the mini-boss and stand in an empty room for 10 seconds before realizing it's dead. Other then that, this BG is quite fine to bot in.
Strand of the Ancients - This BG should be thumbs down when you queue up for random B'G's as a bot. It's too obvious. The bots farm the beach untill the round ends and if no enemy players around they deside to stand in the water to wait for the BG to end. They should try to controll vehicles and follow the right path, shoot at the gate like normal players do. Or protect the demolishers. If one gate fails to down the bots try to run through the gate which is closed obviously. This makes it too obvious to be real players.
Isle of conquest - This BG can be considered "safe" ONLY if a few minor things get fixed. The massive pack movement the bots have atm makes it in this BG obvious that we're bots. Stopping at the same time, turning around at the same time, dismounting at the same time etc. The bots don't have to be able to ride Glaives and demolishers. As long as they protect ours. I wish the bots also could cap less obvious bases like, Quarry and Oil Reffinery. Other then that. This BG requires a lot of players so it's quite "safe" if they wouldn't just all follow the same path, like AV.
Battle for Gilneas - This BG is just like AB quite a drama. All the bots run towards Lighthouse and try to cap the flag. After doing that they face away from the flag and eventually mount up after 2 minutes and all leave the base for what it is and run to Waterworks which is often already taken by enemy players. In the meanwhile Lighthouse gets capped because none of the bots stayed there to protect. I often see in BG chat - report (name, name, name) they are bots. In this BG it's super obvious since it's so small.
I made this list just merely based on Alliance BG farming and from my own experience. The reason why I created this detailed list is because I wish the bots could be more programmed into actually playing the BG instead of only honor farming. Cause winning = more honor and happy RL players! The bots should pick up the tactic based on each BG-mechanic. I think this way RL players would also care less because the bots are actually doing what they are suppose to do in the BG instead of just farming honor. I mean...who finds it bad to win a BG after all?
Please do't take this post as anything offensive, I just merely try to put all flaws in a line so it's maybe more easier and clear to fix it.
PS: I don't have any experience in the new BG's. Maybe I'll update it when I know more.
UPDATE:
Deepwind Gorge: Just overall bad pathing. The bot in most cases, doesn't even leave the starting base. It just sits down and goes AFK and then you end up with deserter. And if it does move...then you'll end up, looking like a headless chicken as it looks like you have no clue what to do. Running in wrong directions, back and forth etc. It's just another reason to thumbs down this BG.
Apart from that is the bot currently not working properly. The bot runs back and forth, casting random spells and buffs. I'm currently using it on my Monk, which casts random heals and runs to places where no one is around. Mounts up, sets up a Jade Serpent statue and then mounts up again to place a nother one a few yards away. I'd say the bot is not safe to use atm.