I understand the need for simplicity with devices that span languages and all ages, however the current dominance of relying on single finger guesture to be used for every new feature is causing serious breakdowns of existing iOS UX paradigms.
eg. One finger down on the springboard does spotlight search, however a single finger bevel swipe down shows the Notification Center, these can get muddled.
What is far worse is in the app Messages, when you cannot single finger swipe up from the bottom to bring up the Control Center because the keyboard grabs the touch first. This also happens in many scrolling apps including safari.
It's now much worse in iOS 9.
eg. In safari a single finger bevel swipe left or right will move the page back or forwards. However, with the new slide over guesture it now prevents safari from detecting the page forward gesture.
Thats a huge problem because iOS has trained users in navigation flow to bevel swipe.
The solution, should be that Apple starts to use a specific number of fingers to perform each distinct action.
i.e
exactly ONE finger right to left bevel swipe - Navigate fowards.
exactly TWO fingers in a bevel right to left swipe triggers slide over.
exactly TWO fingers down on springboard could move to search,
exactly ONE finger down in a bevel top down swipe shows the Notification centre.
exactly TWO fingers up in a bevel swipe now show the Control Centre ; thus removing many problems with the scroll gesture being incorrectly detected in many apps.
This doesn't break established UX skills and learnt behaviour of users, but allows users to use specific and distinct numbers of fingers but using the same gesture to trigger distinctly different actions.
