So last night's episode shows that this shouldn't have been given another season, based on the fact they don't have enough subject material to draw decent stories from.
Well, we had 7 years of ST Voyager travelling through the Delta Quadrant - holo episodes and all.
Except that Voyager was never an arc show. Easier to keep the concept going if you don't have any reason beyond the setting for things to move forward.
I agree that last night's episode revealed things that would make a second season difficult. When they revealed a major plot point to the characters, you get a distinct feeling of things coming to a close. At this point, I'm not sure how they could do a second season unless they reveal a completely new villain for next season and involve more of the outside.