Its ridiculous when all of a sudden your teammate dies, and someone doesn't care about them and takes the boss tokens. Then that dead teammate gets nothing after all of the exploring. I've seen this happen alot at Vanaduke fights when one person dies at the end and couldn't revive. All party members should receive the reward regardless of being dead or alive.
+1 if you support
Yes, they should receive boss tokens regardless if they're alive or not. However, they should only receive 1-2.