I thought Tuvix was a pretty bad example. The whole episode wrote Janeway into a corner. Unless they were willing to fire Russ and Phillips, there had to be a solution which ended Tuvix's life.
Not only that, but there was little dilemma to begin with: one guy on your crew, or two ? Given Voyager's situation, there was no real choice to make. And the trailer promised that it would tear me apart !
At least I learned that clothes can be merged by the transporter.