There is never going to be a single design language that will please everyone out there, and with the sheer amount of users iOS has, there will always be a huge number of vocal critics, no matter which direction they head into.
As for minimalism, I dont see how much more minimal iOS can get without looking like the sea of white that are google apps, or massive text over solid colors that is Win8 design style. Its pretty minimal as is, and apart from a couple textures in some apps (which I dont mind in the least, gives some personality and some differentiation) theres nothing thats there that doesnt need to be there.
Oh, and Ill be pissed if Ive takes away my woodgrain bookshelf. Dont get the hate about that, its the most gorgeous app on iOS or anywhere. What the **** would people prefer, a text list? Its beautiful and functional.
Yeah, I'm not bothered by the wood shelf. I would, however, enjoy it if Apple allowed developers to create "skin" apps so that I could customize both the shelf and the way I organize it. It surprises me that neither Kindle nor iBooks has created this option. I'm always reading, and to me a book shelf is personal and intimate. I want to arrange books however I see fit..not select between "alphabetical" or "last browsed." How about allowing me to pick and choose at random so that I can make my own categories? Philosophy...over here (including any fiction that I enjoy associating with that category, or comparative religion), popcorn fiction...over here. Open up the app to developers, or allow other developers to create alternate bookshelves in conjunction with the app. This is one of a handful of things I still love about a real bookshelf...it's organized personally, with building materials that I chose. This might sound as though I put a little too much thought into this...but compare it to people who obsess over their decorative phone cases. I'd love to have a beautiful book shelf skin. Maybe a rotating room that I can "stand" in, rotate, pinch to zoom in and out, etc. Call me excessive, but I like objects of the mind to have a mental space of their own. No, I don't need a paper turn animation, but it'd be nice to have a virtual mental space within the app so that I can organize my books in a way that makes me feel that I've entered my own personal reading world.