Then the two Tuvix would be arguing over which one of them is murdered and which one is given a free pass, and there's still a Tuvok and a Neelix trapped inside the remaining Tuvix yearning to be free. Of course you'd actually have input form the recovered Tuvok and Neelix as to if it's any good being inside Tuvix, but if they agree with Janeway (neelix actually did years later in Riddles when neelix convinced Tuvok to recover his misplaced identity even if it meant the murder of his current cake making personality.) that it's shite being Tuvix, then that Tuvix would be split too, and then what do they do with two Neelix and two Tuvok? Were the Neelixes expected to share Kes? left and right, top and bottom or timeshare? Was one of the Tuvoks expected to be demoted from their job as second officer, tactile officer and security chief? And then they all fight over personal effects?
Farscape managed to keep it going with two John Chrictons for at least 6 episodes... Meanwhile Riker phasered his clone dead stating that the universe wasn't large enough for two Will Rikers" before it had even crawled out of the bacta tank.
If it was easy to replicate crewmen however, then why did any one ever stay dead that they didn't a replacement waiting in the wings in data storage? And why wait for crew to die before tapping their clones for duty shifts?
Sure they replaced Kim with a quantum duplicate, but it's not like he was a real person to begin with.
