Zavala's had it rough lately, but this is going to be tough to swallow. Brutal nightmares about his past. Seeing the Traveler rez his enemy. Now no rez for him? That settles it. The Traveler has been the bad guy the whole time.
He has a pretty unique voice, which is probably going to be difficult to replace. I'm sure nobody assumed they would have to worry much about that due to his relatively youthful age yet, but like they say, only the good die young. RIP Big Blue.