The Dust Kit is kind of worth the money. After all, if you don't like dusting, that's all it's about, so you don't have to buy it. And it's pure gameplay.
But the CAS and Furniture packs? It doesn't matter that I like the items. There's significantly less stuff than any Stuff Pack, There's no hair or accessories in the CAS pack, and we're hardly low on excercise clothes anyway. It certainly wasn't one of the things people were desperate for. You want to give us something a little more niche that we don't have much of? How about swimwear? Or nightclothes?
The furniture? There's cabinets and a handful of clutter. Oh, I like it. But it doesn't deserve to be half the price of a Stuff Pack. Aged kitchen furniture is hardly what I call 'niche'.
Hardly any of the stuff in the Kits is 'niche', nor does it fill in a gap. It's vague, and easily aimed at lots of people, just so that lots of people will buy it. Emo and super-goth clothes are niche... so less people will buy that kind of Kit. If you want emo and goth style, you still need to buy Vampires, which is a full Game Pack with a life-state in it.