Back on Sept 2013 I noted how awful IOS7 appeared, and that without Steve Jobs, Apple will start a slow decline into the abyss. Seems that I could be correct, with the exit of key Apple User Interface Chief Greg Christie. He was the driving force to the brilliant interfaces pre IOS7, under Jobs.
http://weblinksnewsletter.blogspot.com/2013/09/iphone-ios-7-versus-ios-6.html
See the announcement that Greg Christie is leaving Apple.
http://www.maclife.com/article/news/apple_ui_chief_greg_christie_leaving_apple_allegedly_following_clashes_jony_ive