Re: Janeway in the cases of Quinn and Tuvix
Yes but in the case of Tuvok's and Neelix's life, there lifes could have been considered lost in a transporter accident. Whilst the procedure to bring them back invovled the murder of another lifeform. There is a difference between a life being lost in an accident and taking a life.
But as you say you basically have two choices, bad allow Tuvix to live and consider Tuvok and Neelix as being killed in a transporter accident and worse murder another being to bring them back.
On the continent of wild endeavour in the mountains of solace and solitude there stood the citadel of the time lords, the oldest and most mighty race in the universe looking down on the galaxies below sworn never to interfere only to watch.