It was fun to watch, but the thing I noticed is he is playing the game as if it's WoW, which is why he had a hard time initially (that and never actually reading/understanding his abilities). At one point during the stream he asked "what's a tank buster?"

I haven't really done WoW raiding since Cata, but I don't think WoW has tank busters, or at least not in the same way FF has them. So it didn't surprise me he didn't really see Holmgang as an ability worth using initially.