I agree, personally I don't like it either. Running dungeons should be for the gear. The amount of crafting mats in the new dungeons is crazy, and I've yet to see anything but them drop.

It really seems to me like the new dungeons are purely for vanity. When you only need item level 80 to get into ST, the exact same item level you need to get into the new dungeons, I don't see much of a point in even doing the new ones for anything but the tomes. It's as if the myth sets are intended to be rare vanity now that can be skipped over completely for gear progression.

Other than the tomes, the accessories from them could also be useful, but honestly with the amount of times you'd have to run it and sif through crafting materials to get the specific accessory you want, you'd probably have gained enough soldiery to just get an ilvl 100 one instead.

So really, it just seems like they're only for vanity purposes now.