I just rewatched this episode after reading these comments and I have to say I completely disagree with you.

Firstly, Tuvok and Neelix were not dead in a classical sense. Their bodies and minds were merged together into a third being. If they had legitimately died, they would not have been able to separate Tuvix back into two separate ALIVE people. To suggest that Janeway somehow ressurected two dead men after murdering a third is a bit disingenuous IMO.

Additionally, I think it's a bit misleading to refer to Tuvix as a completely individual newborn. Right off the bat he introduced himself as both Tuvok and Neelix and expressed that the had retained all of the memories, skills, feelings, and characteristics of the two men. His entire personality was derived from these two men and not something new/unique to him. This is completely different then an actual babies who may inherit traits from their parents but are unique in their own right.

While they did not know if they would be able to separate Tuvix, they were willing to accept their loss and welcome the new guy, however they determined with confidence that they could perform the separation. At that point the moral dilemma becomes: do you let two people die to save one, or do you kill one person to save two?

It's a take on a classic dilemma which, on paper, feels obvious to answer. The point of the episode is to demonstrate how difficult this ethical dilemma actually is when you have to look a man in the face and tell him his life isn't more important than the lives of two others.

I think it was also intended to highlight Janeway's ability to do the right thing even when it is brutally difficult. The episode ends with her walking away, distraught and affected, while maintaining her demeanor. THAT is why she is the captain of the ship.