I fine it annoying as hell when the alliance are trying to hold the bridge and when we think we're doing good, we get flank off to our right where the cliff is. The horde jump up onto the kill and able to walk ontop of it and right into out base. Mines will not stop them because they are willing to sacrifice one another in order to keep progressing.
If you had to fix the opening gates for the alliance because we were able to mount up faster then the horde, then you should be able to fix that back door cliff. It's injustice that they can pull that BS off in the battleground.