I'm not sure when the ToV pathing actually went live, but I noticed yesterday they were following the halls better so I assume it was live then.
I was in West when a blue drake that I tried to pull around a corner got caught in a wall. About 45 secs later he came up to the group from a completely different path with 6 or so friends. I had nearly the entire wing cleared at this point so I assume it could have been disastrously worse.
If you need more info about where I was in west, etc let me know. Otherwise this is a heads up for anyone playing in ToV to watch it when the mobs pop into the wall.