Most people don't really want interpersonal conflicts on a crew on a tv show, it just doesn't seem like things would hold together.
Yet there was a lot of bitching about Voyager's lack of interpersonal conflict in a more dire situation. The main difference I can see is that on Last Resort, the viewer SEES the crew is hearing that someone wants to kill them. On Voyager, everything was assumed--the only real sign was B'Elanna's comment and Chakotay's put down of it. No other mention of "hey, we're 70K lightyears from home, so let's put this shit aside and focus as a team." I suppose we were to assume a line like this was actual said and heard by the crew--or maybe they were professional enough to not need it said.