And I find it is a much more efficient use of space too, as I only have only half the space allocated to clothes storage that I used too.
That large extra wardrobe has gone from the house!
I agree that it is restrictive (and it is) but then by its very nature minimalist is restrictive.
So to answer the question "Do I do it for my dolls?"
No I don't. I buy entirely what I like for them without taking into account what I already have for them.