In a nut: It used to be a lot quicker to flip music to Airplay speakers. Prior to iOS7, Airplay used to engage with 2 quick taps. Now it takes a full 5 taps & swipes to achieve the same result.
Two Taps on iOS6
Remember these two screens?
The airplay button automatically appeared if airplay speakers were available.
1. Tap the Airplay Button
2. Tap the Output you want
The screen dismissed automatically & you were on your way.
Five Taps on iOS7 and iOS8
1. Swipe up to access the Control Center.
2. Look for Airplay button and Tap
3. Tap the Output (Apple TV)
4. Tap Done (and wait...)
5. Tap the top of the screen to dismiss Control Center.
It's substantially slower, and I'm disappointed they didn't improve this on iOS 8. I have submitted this feedback to Apple through iPhone Feedback, and I encourage you to do the same.