I honestly don't think Bareness is really supposed to show up very strongly. It's more like a brightener for your cheeks that adds some very subtle depth and volume and color balances, without using shimmer or overt light reflecting glow. Did you try Amber Glow MB from Apres Chic? Very similar idea, but without the shimmer and sheen you'd see from that one in some lighting. Bareness's color is less peachy than Amber Glow, more neutral nude.
I think it's gorgeous if you want a serious no-makeup makeup look. I guarantee you will fool everyone and will hear a lot of "wow you look really rested today!" comments.
I love them both, haha. I'd break it down by 2 factors: #1) Are you usually going to be wearing it over foundation or otherwise not just slapping it right on bare skin - in other words, are you OK with a blush that's not just one-and-done? #2) Do you want something for that subtle sculpting effect or do you want something that is more of a straight forward blush that adds color?
Bareness is the one for a nude or color-balanced cheek that sculpts without obvious shadows and shimmery peaks - if you need real color on the cheeks, you'll need to use it in conjunction with something else. At Dusk is for adding a little healthy pink glow to the cheeks, but it's not that sophisticated sculpted effect. I usually don't do well with pale pink cheeks, since I'm sallow, but At Dusk gave me that healthy youthful glow like you just pinched your cheeks, while looking really natural and not like Little Bo Peep. It's a great pale pink for older skin in particular.
From what I remember of some of the blushes you've bought, I'd say go with Bareness instead of At Dusk, since you already have standard pale pink blushes that you're happy with. Bareness will be more different from what you have and is honestly the most fashion forward of all 5 blushes, imo. Just don't expect a flushed effect - it's for accentuating, not coloring. Makeup magic tricks time!
Actually, my guess is none of these blushes are going to look ashy on anyone and that's what makes them unique. The texture is what would cancel out any ashen effect. They're just not powdery in any way, shape or form, plus they aren't shimmery or have obvious whitened base tone, and just sit on the skin in a very smooth way. None of the colors are particularly bluish or drastically cool toned, either. As great as the Tres Chic blushes are, even I couldn't pull off the pale lavender one, so if all of them worked for you, you are definitely not going to have any problems with these ED ones. Normally I say to try stuff out in person for yourself if you're ever on the fence, but this time I feel like I can stand by my impressions here and say "go for it!" to anyone who wants any of these. Really the only dangerous color is maybe Blazing Heat, but only because it might lean orange on very cool-toned, reddish people.
I used the dark, natural side for applying and the pale, synthetic side for blending the edges with that duo-fiber cheek brush. Up till now, I haven't owned on - I just have the eye brushes and the fantastic and amazing angled kabuki, which is my all-time favorite blending brush for my cheeks.
Just from your avatar picture, I bet you'd be able to make all 5 work for you - none of them are difficultly cool-toned and they're the opposite of thick or powdery in texture!! If you head to a store and play around with them, let us know how it turns out! I can only make an educated guess based on the color and the texture, but nothing beats hands-on experimentation.