Thankfully the "old" style performance summary returned to the app shortly after the upgrade and the uproar that followed. Kudos to the Dev team for listening to users.
That said, the out-of-studio workout feature needs help. If you are like me and do intervals outside of the studio, you need the ability to keep time. The big issue there is that the app doesnt prevent the phone from sleeping, so you constantly need to touch the screen to keep the phone unlocked and the time visible.
The display of the time could also stand a larger font, as is it is difficult to read even on a treadmill.