I do really think the key to all of it is finding what really suits you, style of jacket, skirt, dress etc and also what you really like to wear. Secondly, if it's capsule you need versatility from every item. More than where you buy from, look at fabrics, I find it doesn't matter how much I've paid for clothes, the fabric, how it wears and washes dictates how long it lasts and how good it continues to look.
I don't suit cropped jackets, as I have longer legs and a shorter body, so a longer jacket suits me better and I'll wear it more because of that. Zara and Mango are my faves.
Skirts with a proper waistband don't suit me either, they never sit right, so I buy skirts with no waist band, a semi elasticated waistband or draw string. Baukjen, Silk Fred and M & S.
I buy shirt dresses as I can belt them where suits me or wear them open over jeans and trousers with a cami. Cos, Warehouse & Reserved.
Crop trousers are better on me, either flared or straight, but they balance out my legs to my body.
I suppose what I'm saying and what other posters have said, is really think about you, your body shape, the life you lead and your budget. Then plan to spend accordingly, never discount any shop and don't get too bogged down in it.