How finished is Deadlock?

Deadlock has only officially existed for a short while now (although we all knew about it before—Valve just didn't want to admit it). But ever since Deadlock was made public less than a week ago, I've been enjoying everything that this Moba/shooter has to offer, even in its infancy. 

Different studios tend to have different ideas of what constitutes various levels of done. One dev's early access could be another's finished game, and just because Deadlock is currently sitting in a closed beta...