Hello,
Changes are never reduced to simple aesthetic changes. We must recognize that they are always working to improve the user experience and in this sense there have been many changes recently for good. In addition, the changes are based on the comments of the users, which is very important. Always, when designing an application you have to put yourself in the place of the users and although it seems obvious, it is an error that is committed many times.
For example, the loading time of the web is a very important factor that can make many visitors desist. The new stepped load of images improves the feeling that the visitor perceives and that will surely increase the visits and their duration. To delay the actions that are carried out when placing the mouse on the preview images, is also a success. Before it was a bit annoying and also returned to show the images from the beginning. This change greatly improves the experience, especially in models with many images such as mine.
Renumber the images I find useful, but so would the preview (and the seller's name), time is money and the more information is available in less time, the better. I only see an error (z-index) in the images that are displayed on the foot of the page, you can see the text on the image.
As always, good work.