I stopped using iOS devices a while ago, and though I thought they were great devices once jailbroken and extensively modified, I always thought the devices out of the box were incredibly disappointing, with numerous small but not insignificant design quirks. The version 7 update seems to do a lot of things right, such as the quick toggles and finally introducing multitasking, but there's still issues I had with the OS that remain unchanged, such as the inability to set third party applications as default programs, the App Store being the sole distribution platform for applications, the inability to install applications outside of the App Store, the inability to browse the filesystem, the lack of connectivity to other devices other than PCs with USB cables, the inability to transfer any data without using iTunes, the proprietary ports, and the use of proprietary standards such as AirPlay over preexisting standards such as DLNA, to name a few. The biggest change that people seem to mention about iOS 7 is the loss of the previously used skeuomorphic design, which never really bothered me.
It seems to me that the really big change Apple needs to implement to allow real innovation to occur is to allow third party development to occur outside of the App Store. Just about every change in iOS since its original incarnation had already been seen in jailbreak mods. Rather than one company trying to implement every good jailbreak mod to ever exist, surely it would be easier to leave it in the hands of the huge third party development scene.