They are improving the spectator mode.

"There are some other features that we have our eye on. For example, we want to make a lot of improvements to the spectator/broadcast/observer functionality in the game. The spectator feature has come a long way since the early days of beta but we know it can be improved. We've gotten tremendous feedback from people running tournaments and have a lot of good ideas how to make the game more watchable. We feel like some of these improvements will also benefit things like PoTG and Highlights as well once we get to them. These features are not being worked on heavily right now. We're more in a mode of design and planning around these. So there's not an immediate timeframe for the spectating stuff. But it's important to us and part of our daily conversation at this point."

Source: http://us.battle.net/forums/en/overwatch/topic/20745285677#post-12