I'm just going to go on a little rant here. I am really regretting upgrading to iOS 7:
1. Personal preference, I hate the animations. I disabled everything I could in Accessibility etc. Stuff like the bounciness in SMS is just goofy and slows down my phone.
2. Lag - I have a 4S and things are just slower. Especially MMS. Sometimes up to 6 seconds to send pictures. Super frustrating when you're sitting there waiting for something it did instantly a week ago.
3. Email - especially Exchange, disappears after updating. Usually a hard reboot solves this. Pain in the neck for my corporate users who update and then have no email, especially when they're traveling!!
4. Calendars - similar to the disappearing Exchange, for some reason a lot of the phones have decided to hide all calendars by default after the update. Then we'll go from 7.0 to 7.0.2 and it will hide them again! I had corporate users missing meetings because they didn't get alerts because the OS decided to auto-hide their calendars! Garbage! VERY frustrating!
5. Crashes - initially I thought it was just that developers hadn't updated their apps, but even Apple's Camera app crashes on me a lot. The Camera is probably the most-used app & feature on my iPhone, so this is a pretty big deal to me. I was out doing some iPhone shooting the other day and just had endless crashes, even after multiple hard reboots (and using different camera apps too!).
6. Camera issues - I have weird color-shift issues in video. I hate the slider on the camera button because I always accidentally flip it to video or square.
7. Autocorrect has gotten worse. Noticeably worse. It's terrible. Plus no Swype or Swiftkey or tactile feedback when typing - they could do a whole-phone vibrate haptic keyboard and buy up Kii or something.
8. Accidental presses - I accidentally open stuff like Search or Control Center when I don't want to (and then of course they don't open properly when I do want them to). I accidentally put my phone on speakerphone all the time when it's on my ear, which happened very very rarely in the past. Or I accidentally end a phone call. Or I accidentally slide-to-unlock the screen, especially when it's buzzing my pocket to answer and the phone call has already started by the time I take it out because of the slide. And then there's the weirdness of "slide to unlock anywhere" unless you have a SMS or something, then it slides straight into that app instead of anymore to the main screen.
9. Smaller buttons - everything is worse now for the GUI to me. Smaller numpad when dialing for example. And the iOS7 design updates for a lot of apps reflect that, like Camera+ - smaller buttons across the board, very hard to grab sliders or push buttons accurately.
I have other complaints, but that'll do for this post. Not a day goes by when I don't get a business user asking me how they can downgrade. Everyone is always hot-to-trot on new updates and don't bother waiting it out at work, so now I'm stuck hearing all of the issues. I doubt Apple is going to resolve most of these, because (1) iOS7 is the new design language, so it is what it is, and (2) Apple is a big fan of planned obsolescence, so I don't think I'm going to see much performance boost on my 4S under the new iOS, even though it's a perfectly capable phone.
It's just frustrating, mostly. Overall I like the Control Center addition and, you know, the phone is usable on a day-to-day basis, but like I was at the beach on Saturday and wanted to do photography for a couple hours and ended up only getting a few good shots because I was constantly crashing & trying hard reboots to fix it:
https://twitter.com/weaksauce12/status/389165141360914432
/rant