Well, i had hoped zos would fix this in one of their last 2 patches but evidently it hasn't been reported enough yet. Keep doors and posterns are not working as intended where some people can see a hole as if the wall has been sieged but there's a door in the middle of the postern.. not everyone can see it but many can .. you can walk through this space quite easily if you can see it, thus permitting you to enter posterns that haven't even been sieged... Saw a well known raid do this at bleakers on vivec EU (not named due to naming and shaming purposes but you know who you are) When a keep changes hands, this disappears as it "renders" the captured keep again once it changes hands. On top of that, you'll see in the first pic on this link below, you can have a door still showing and not pass through while it is at 0%.. i was watching people run through this but couldn't myself.. it was quite funny when a yellow raid appeared to defend their keep but half of them couldn't pass through due to the fact that this door was in the way for some of them
Let's hope something is done about this soon because let's face it, it is pretty game breaking. Pictures below
https://imgur.com/a/6awJWr1
Most Averagest Player EU PvP - More averager than you'll ever be.. GUARANTEED!