Do you have any screenshots or even a certain part of a video I can pause so I can see this in action? I invested a large number of hours into the beta and I nor anyone I play with has even noticed such an indicator. If it is there it is definitely a step in the right direction and Bungie understands the importance of some kind of indication. Although the issue with this is of course usually by the time you can see a players name tag in-game it is usually too late by then. An alternate colour on radar would be ideal, giving you a chance to flee or prepare accordingly and not feel like there was nothing you could do to prevent death.

it was in a video as part of another post. il see if i can find something for you. https://www.youtube.com/watch?v=W9q331jv8oA in this video after the titan is killed you can see the indicator on the player who killed him sitting in the corner its at about 16 seconds in

I have seen that before and never known what it actually was. It is a start but I think it needs a little more like I just mentioned. This video is also very good for those pesky posters who try to justify supers in that you can kill players during their animation (outside of lag) and that supers arent over-powered. Thanks.