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.
Moe: I'll take the blonde!
Larry: I'll take the brunette!
Curly: I'll take the Black and Tan!
--Wee Wee Monsieur (1938)