I really wish we could spectate our friend's competitive matches! I know it may be a problem if the spectator start to call out the game, but a solution would be watching it with delay.

We want to add more spectate features to the game. We're definitely on board with this idea. It's just a matter of time and scheduling for us at this point.

Despite the really early date of this post, spectating Competitive matches is still not an option. However, the ability to replay matches is now available and can shared with others.