Should there be a UI change? Yes, iOS desperately needs a major UI overall.
I hear this all the time but no one cares to show what changes they think are necessary. It is like those occupy protesters chanting we want *something* and when you ask them about what is that something they stare at you.
Seriously, what exactly is desperately needed? I use a captivate nowadays (cheap deal, backup phone turned into main use for now) and even then I am hard pressed to see what major changes would be needed.
Well to give you a solid answer, I'm just tired of the overall look of the UI. The app icons, the chat bubbles, the dull white and blue throughout. Everything looks cartoony and not very modern or sleek. I'd like to see darker colors, sleeker, less rounded looks all around. I'm jailbroken and still waiting for my favorite themes to gain iOS 5 compatability but take a look at FIF7Y's themes for reference.
I know that with Apple's walled garden they'll never enable user themes in iOS but the least they could do is innovate the look of the UI since it has mostly looked the same for the last five years.
Nice occupy comparison though .