i just spent about 2 months in the game and during time, what i see that ,people just too lazy to defend orgrimmar. Some couple of parties invading to orgrimmar but players just saying " nothing special they come always".
I think, its because of overdose PVE mentallity :D Sad to see a bunch of players who just run to fight against them ( im also pve) and ofcourse there are many players are AFk but thats why we choose a side to fight for it. Little bit RP.
why should anyone give a **** about their city leader? you get nothing for defending it other than some honor which is easier gained in bg's. vast majority don't give a **** about rp either so that doesn't matter.