Sympathy
I want to start by sympathizing with iPhone users who have been reluctant to upgrade to iOS 7, and for those who did the upgrade and regret it. They have legitimate issues, ones that can’t be lumped under a sweeping, “Change is hard.”
Many folks have suffered dramatic decreases in battery life. Some found their apps crashing, and older apps not working at all. The new animations are dramatic enough to induce vertigo. If not for those serious problems, more people might have forgiven Apple’s choosing garish colors for their app icons, and going rather overboard in the Kate Moss-ification of their interface design.
Satisfaction
Now I’ll say that I have had an almost totally satisfactory experience with the new OS. Control center saves me a ton of time, Siri feels smarter, I love knowing my phone is locked to my Apple ID, Safari works better, and Camera and Photos saw massive improvements. And the layered-but-simple interface makes the whole experience more fun, more playful.
But I got bit by the iMessages bug, and was annoyed by the fix. And I have weird problems placing the text cursor.
I would entertain the popular beef with Apple’s app icons, but I don’t use many apps by Apple. Only the ones I have to, like Phone and Messages. On my phone, I have gone into Settings > General to Reduce Motion (I wish it were more comprehensive), adjust Text Size larger (I wish more apps accommodated Dynamic Type). I tried Increase Contrast, but I prefer the new translucent effects.
I do appreciate where Apple has taken their design language, and I think they had to push it as far as they did. They had to make a dramatic point about software UI, to challenge the rest of the developing world to break out of the bubbly chains of skeuomorphism. The resulting overall look is unquestionably cleaner and more efficient. It’s also worth saying that 7 beats the current Android and Windows Phone offerings into the ground.
Conclusion
While iOS 7 does represent a marked step forward for mobile technology, those who haven’t upgraded don’t have to just yet. Apple should have an update out soon that fixes the majority of bugs, and until they do, later adopters might stick with ol’ reliable iOS 6. When you do make the switch, there are dozens of articles to help you recover from problems and tune the system to your liking.
But change is inevitable. Developers have actively left iOS 6 behind. Apple is sure to require 7 to interface with whatever new magic they release. And once you’re in it, I really think you’re gonna enjoy it.
jjmarcus tech solutions 
So, does Apple plan to tone down the "new animations are dramatic" that cause vertigo in some? I’m super sensitive to such motion to the point that it can trigger a migraine. I’m seriously considering the need to find a new phone if they plan to keep all the animations.
Sure enough, the Reduce Motion option in the iOS 7.0.3 update released yesterday is far more effective. Go to Settings > General > Accessibility.