Chiming in late here. The jacket was the bomb, but you know that already. I haven't had good luck with Dolce Vita shoes. I think the style is always there, but maybe at the expense of something else. I'd pass on the Pleonie style blouse. The color is good, but even in a smaller size than the one you previously tried, it still looks too voluminous. I like the colors of the Ted Baker tee on you, and you can mix it up with other darker pieces as needed. I agree you gotta be careful not to look like a birthday cake, but you could get the white version of the Helmut Lang jacket and then it would just be a garden party or something.
I got my first HL piece this summer, a black blazer that I have been using in lieu of "office sweater" and I love it more than I expected to. I bought it online as I do many things, because I live in the boonies. It's hard to assess their clothing in online pictures because it tends to be dark and drapey. But maybe I'll try more pieces. Can't do that one because of the short neck problem.