I just re-watched "Where No Man Has Gone Before" and wondered why they killed off Kelso. I know, it was just a pilot and no guarantee that the series would be approved.
I thought Paul Carr did a great job and thought the character of Kelso would have been an asset to the series.
Well, I think the character was slated to die in the script even before the role was cast. It's too bad a good actor had to play a character that would die. The alternative, of course, would be to intentionally hire a crappy actor for the role that no one would be dissapointed to see die.