Yes, the break-up between Neelix and Kes was really abrupt. However, Ethan Phillips once said that later in the show there would have been a break-up scene between the two of them, which they did film but it ended on the cutting table.But looking at the Memory Alpha entry on “Warlord”… that’s how they broke Neelix & Kes up? I remember finding the relationship remarkably unpersuasive at the time (what did they see in each other? Were we actually supposed to perceive some sexual heat there?) But even for a coupling as implausible and flimsy as this, it’s such a strange decision to break them up during a possession, and then just not go back to it.
Which, I think is pretty unfortunate - but we've seen worse.
How did you like WORST CASE SCENARIO? That's a huge favourite of mine.