I do wish it was possible to spectate after death, at least a certain amount of time without respawning or some such. I do wish sometimes I could see those next 15-20 seconds after my early death to see first hand how the rush/whatever is going.
It would be as close to a legitimate use of some spectating function as we can get, and I'd love it, personally. It can be somewhat anti-climatic to be part of a big, defining moment but you don't get to see any of it.
Thats somewhat different though.