I'm glad this topic existed. I was just coming to post about this. I'm guessing the aggro radius problem was designed to threaten mounted players - give the mobs a chance to hit. That said, it is irritating. I feel like I can't walk anywhere in the expansion or I'd constantly be in combat. One must mount the moment combat is over or you'll be stuck for another round (be it from the enemy you didn't see waaaay over there or from the mobs respawning behind you). The problem probably isn't that big, really, but it's compounding: Large detection radiusLong following distanceFast respawn rateThe number of enemies that spawn in close proximityThe general strength and abilities of mobs in this expansionAdd these together and it is a bit irritating. This might have felt right if we had the option to escape combat on mount, but as-is, it feels like a tuning problem.