To be fair, the Ogre Kingdoms DLC seems low priced compared to others. Without sales discounts I see it listed on steam at $15.99CAD. In contrast, the regular price for the Rise of the Tomb Kings DLC is $21.99CAD. The question is, what was the price of the TK DLC at release? Has the regular price been lowered, or does CA / Steam just apply sales discounts to an unchanging regular price?
Either way, the full price of the Forge of the Chaos Dwarfs sits at $33.49CAD, which is a significant percentage of Warhammer III's base game price ($79.99, though currently on sale for $53.59).
I guess you have to pay for quality. The Chaos Dwarfs, being the best race, carry the highest price tag.

Now we'll have to wait to see how many people are willing to pay that much money for a DLC. If I was playing Total War, I'd buy it, but I'm also probably more of a Chaos Dwarf fan than most.
I wonder if CA will eventually release a complete edition of the Total War: Warhammer series with all the DLC included? Maybe I'll have a computer capable of running it by then!