I think the worm cult is still trying to restart the Planemeld even if their boss is indisposed at the moment, like the ones trying to build a new dolmen in Wrothgar. You never actually repair the veil between Mundus and Oblivion so Bal can keep opening portals to Coldharbour, sending daedra through and generally be a class-A jerk, even if his hopes of conquering Nirn in one fell swoop have been dashed.

We're not really in the same 'game' though. We are in a high level version of it that has everything scaled to the level we are. It seems to be a different map or else there would be all the younger levels roaming around.

So there is no need to be seeing these anchors since it's not really MP in post game. I've not seen more than about three at max (in the heavy merchant areas) in anywhere post game for these other faction quests. It is quite literally a SP game at this point. The world is desolate compared to pregame everywhere. Only now Molag is dropping his anchors and there is nobody around them. Or at least not to the areas I have been so far.