I respect your opinion but hope we can agree to disagree.
Let me explain
I post process in such a wide variety of ways to make my work stand out in the local market. I have always offered post processing included with the shoot, as the clients I attract expect it. This client received 100 post processed images. But wouldn't it be boring for them to all look the same? Photography is an art form and part of my expression is how I see the finished product. I don't see it the same way for every shot. My clients hire me as well for what they see in my portfolio and on the studio website. They trust my vision. At the same time, as I mentioned before, this client also trusted me to process the images to her liking as well. Image 2 & 4 are my take on what she meant by vintage and faded.
And like you said, your opinion is that having different post processing in a series looks weird. And I respect that. But too me, having the pose change and each image look the same in terms of WB and toning looks weird.