Would like to hear people's thoughts regarding the comparitive usefulness and power levels of the new BRB lores and the existing lores in the game i.e. chaos, dark, high, skaven, o&g, beasts etc.

I think these new lores trump the existing lores quite comfortably. I'd take a BRB lore over the existing ones wherever I am given a choice.

Any experiences people want to share of the new lores in action ? what is the feel of them so far ?