It annoys me how hidden a lot of these features are and it's something we've spoken about recently. Ideally all of these customisation elements would be available in Lumbridge as it is where everyone starts... but I'm not sure that's realistic. At the very least, a redesign of the UIs is needed, especially for the hairstyles as they've been added to without much consideration with how crowded the UI has become. More bracer and feet varieties would be nice too (like a barefoot option!)
Thanks for putting this together, it helps a lot having all this info in one place :)