The commentary on this is pretty funny, one guy is basically just explaining everything while the other guy says "ok, mhm". I get that it's for the benefit of people watching, but I feel the other commentator could be contributing more.
Elegon is nearly down though, about time for Will.
Rob Simpson's a very good friend of mine on the eSports team. He's also an incredibly talented WoW player and gamer in general. But for the last several months he's been very focused on StarCraft II and hasn't had as much time for Mists.
But, you're right, there are a lot of people watching who may not be familiar with the fights, particularly on Heroic. So it's nice to have that banter to naturally provide insights on mechanics. Not only that, but Ion's pro! I think it's pretty awesome to hear the lead encounter designer really walking through a dungeon's design in much more detail than he would in any interview. ;)