When I spectate, it's usually 'cause I want to watch my friends or guildmates. I tried finding whatever blast network match my friend was in from the list but I wasn't able to see it at all, so I guess there's room for improvement in the existing system.
Anyways, the suggestion: We should be able to click someone in our friends-list and choose "spectate" if they're in a PvP match.
I don't know if there's an existing thread for this suggestion. It seems like there would be given how obvious it is, but the search function on this forum sucks.
With this, I can stalk in peace