It's not quite the way I'd like it to be yet, but in the next patch I'm allowing access to the AISpectate map which can be found through the Create portal.
In this map you will spawn without your monster and won't battle other players. Instead you will just sit back and enjoy watching AI go at each other.
Read more about the new AI Spectate map here:
https://mdotexe.com/2016/08/06/ai-spectate-coming-next-patch/