Pretty much this. Thf isn't op, just lots of people like playing it. Lots of love goes into finding best in slot thf's sets. You should see how heated the debates get on ffxiah. And even if you think it's easier to gear thf to do okay damage, when it comes to balance that should be adjusting the upper limit of the job, and the upper limit of thf is far from op. I don't like having my favorite job being the bandwagon job right now, but I don't want it to be nerfed into nothing.
I must say though after watching the video I'm very impressed with that 4 man group. Run served multiple purposes, tank, opening skillchains, and used gambit to make the mobs weaker to fire. The geo's Malaise also helped with the extra magic damage. I didn't pay much attention to the cor, but I'm half surprised they didn't have them go /nin for Hyoton: Ni. Also that was the best smn I ever seen. I guess that is to be expected from a mythic smn.