Re: Why did Trip have to die in the final episode?
Problem with "These are the Voyages" is that what was happening was weak compared to what the ENT crew had faced during their run. The Xindi conflict, the warp core sabotage by the Klingons, the Romulan drone ships to name a few where the stakes were higher than mere highjackers in space. Couldn't Trip just call for a security of Maco team? No, Braga had to get his rocks off killing a main character since he never got to kill 7 of 9 like he wanted to.
He finally got to do that in a recent post-VOY TNG comic book. It had the same kind of tacked-on vibe as Trip's death and totally worth disregarding, IMO.
"There's always someone wanting to ruin a good party..."