What would be better is having a return button up in the status bar so you could tap once instead of double-clicking and tapping. And guess what? Apple has finally built this functionality into iOS 9... sort of.
This new iOS 9 feature basically adds a "Back to Search" or "Back to App" button in the top-left corner of the status bar, which is exactly what I wanted. However, it only appears if you opened the current app from within a link in your previous app.
For example, when Twitter or Instagram links open in Safari, there is now an option to simply tap "Back to Twitter" or "Back to Instagram" in the status bar. But why not make this universal for all apps?
As you can see below, a link I tapped on from within Instagram redirected me to Safari. If you look in the top left corner of my display, there's the "Back to Instagram" option.
If you've been redirected after selecting a link from the Proactive Siri Search page or Spotlight search results, the new app will display "Back to Search" instead.
It's an awesome new feature, but I'm still not sure why Apple stopped short of making it work for any app, no matter if I tapped on a link or not.
Maybe they don't know what to do with the carrier and Wi-Fi signal. It's important info, and squeezing it somewhere else on the status bar could make it very cluttered, which is very not Apple-like. Well, how about an invisible gesture that can be enabled/disabled in the Settings app then? That'd work for me. How about you?