This is a blatant map dis-balance in Murkmire.
EP has 3 one-way milegates to stop DC invasion. DC has 3 one-way milegates to stop AD invasion.
AD's bridges are equally balanced between EP and AD, hence it's transit can not be controlled by the AD, like the other two alliances.
The result is that all the milegates and the bridges are down most of the time and AD is stuck inside in its own domain, while DC keeps coming through the one-way milegates (I know it can be further destroyed, but the two side parts need to be destroyed, both of which have twice the HP of the center part). So AD is forced to use the goat-paths/tunnels to enter enemy land, which are very ganker prone. And if we try to repair the gates/bridges, the entirety of Cyrodiil is alerted by a notification, making it very hard to stealth siege an inner enemy keep.
Both EP and DC have alternate ways through the milegates to enter enemy land, while AD has none and has to guard every DC gate and the tunnel to prevent an DC invasion. This is a blatant map dis-balance.
@ZOS_BrianWheeler ,
@ZOS_GinaBruno