iOS 7 runs great on my iPhone 5 but runs pretty bad on my iPad 2. The main issues seem to be keyboard lag and general lack of responsiveness at times in the OS. Many people in my extended family and friends have iPads and think the amount of white is excessive. My mom said "I'm going to have to wear sunglasses now to use this thing!" I told her she can easily turn down the brightness, but that also decreases contrast which isn't good for people with poor vision.
I'll just leave my wish list here:
- Speedier animations for crying out loud!
- Fix warning popup when using cellular-restricted apps even when on WIFI (I have YouTube blocked for LTE because I sometimes forget and even on WIFI it always pops up and it's annoying!)
- Fix lag on older iPads, especially with keyboard
- An option for a darker UI would be great
- Weather icon with temperature in notification center. Why do I have to read my weather and only sometimes get the current temperature??!?
- More "widgets" and customization for notification center "Today" view
- Control Center settings customization. Example: Toggle Tethering instead of Airplane Mode
- Social share sheet buttons return in Notification Center
- When selecting a photo to share from the camera roll, I want back the option from iOS 6 to add to Photo Stream directly
- Touch ID "User Logins" on the next iPad to switch content, wallpapers, mail accounts, etc based on fingerprint when unlocking so families can share
- More motion wallpapers and/or an API to develop them
- Real-time Weather app icon with temperature
- More than 9 items per folder page on iPad!
- TouchID API for apps like banking, MyVerizon, Mint, Find My iPhone, etc
- Ability and standard API to replace default apps with equivalent types from the App Store
- Pushing home button while on home screen opens Spotlight Search like in iOS 6
- Fix glitchy old reminders from showing up in Notification Center (what is even up with that?)
- Contacts icon looks gross, especially on iPad for some reasonperhaps because it's used more often on the iPad?
- News stand icon is also weird and tacky, should go back to showing little previews of magazines
- Reminders UI needs improving. It's just not that good.
I'm also looking forward to updates to the iWork, iLife, Find My Friends, iBooks, Remote and Find My iPhone interfaces to more closely match iOS 7. I think October will be a good month for this.
For a dark UI, try a dark wallpaper (mostly black). Radically changes the look/feel in my opinion.