I agree with the OP to a certain degree but at the same time think that the present level of customization is what make the Metro UI very unique and refreshing. I love that WP does not allow for the same level as Android (and I do own android phones) as sometimes, customizing everything becomes the obsession (along with ROM flashing). At least thats how it works for me. I love my WP phones the way they are because I am not constantly changing my wallpapers, ringtones, and trying to figure out how many widgets I want on the screen and what positiion they are in, etc...
So long story short.....I like and dislike the idea of the OP.