I agree that some of the features are not needed or widely used, but FaceTime is the best video calling solution available. I have a Samsung Galaxy Tab and have tried Tango, and others which do not warrant remembering, and they are not as good as FaceTime. As for easy to use, it doesn't get easier than iPhone. Far too often, I hear that people with any amount of technical aptitude prefer Android, but that isn't necessarily true. I am a network architect with a background in Windows as well as Unix/Linux, and, although I really like my Galaxy Tab, I can admit that iOS is easy to use and works well. I agree that the design is a bit antiquated, but most of the customization allowed in Android is not needed or recommended from a security perspective. The iPhone is a much better device than it is portrayed to be, mostly by young users that don't really know tech.
I should mention that a caveat of FaceTime is that you require a somewhat modern iPhone, iPod Touch, or iPad. Although this will cause many Android fans to throw up their arms, it is notable that not all Android apps work with all Android devices, such as Samsung's Milk Music, which only works on a select number of Samsung devices.