Re: Why did Trip have to die in the final episode?
I suspect there would have been less outcry if it had been Archer to make the ultimate sacrifice. It would have made more sense dramatically in terms of the series as a whole. Though maybe they saw that as too similar to Sisko's fate.
Curly: Moe, Larry, the cheese! Moe, Larry, the cheese! (Horses Collars, 1935)