To be honest, I just ignore when people complain about how iOS looks, and when people claim "it's hard for older people to use" I don't believe that claim at all.
In my entire extended family I am the ONLY person who cannot legally drink or even be recognized as a legal adult in the US, and soon I'll be the only person under the age of 30 as well. My two cousins are in their late 20s, and the next youngest person is 50, the oldest being 80.
They all have iPads and/or iPhones running iOS 7. My grandmother and my mother, the two most technically challenged have been on iOS since the 3GS days. When they both upgraded to iOS 7 the only issue they had was that the text was too thin and luckily Apple included an option to bold the text. Everyone else had no issue with that.
In addition I help out plenty of older people with their devices as most of the residents in my city were born during the baby boom or earlier, and those who have iOS devices with iOS 7 have almost no usability issues, although a very select few with poor eyesight do, but then they can hardly use any smartphone.
I know this argument wasn't the main focus of this topic, but i'm just weighing in.