For me the limited customization is a feature. I am a very undecisive person and a lot of configuration options give me anxiety. I like the approach of having great defaults and the limited numer of options (with some customization possible via extensions) give me freedom to not have to worry about the desktop I'm using and just focus on the task at hand.

The extensions ecosystem [1] is great for customizing and I'm yet to find something I need to cusomize that doesn't have an extension for that.

https://extensions.gnome.org