The "Always on the movie" thing also limited the development of the surroundings as well. The whole series should've taken place in the same general area. Like how despite Farscape being about Crichton wanting to go home they never left the area of space the Peacekeepers and Scarrans lived in. The Viddians, Kazon, Krenim, Hirogen, etc all exist in the same area of space instead of a "One at a time" method.
I actually like the moving through space scenario but I don't understand why it had to remain a 99.9% alpha quadrant crew. Living Witness had many things going for it but imo the idea that Voyager had delta quadrant races on board was one of the best. And the sad thing is they had opportunities to do this.
Initiation immediately comes to mind. Why couldn't the Kazon boy, faced with death because he failed, join the crew. 7 became Janeway's pet project yet the bond forged between Chakotay and Kar was stronger imo. There are many other examples as well. Mixing the crew with delta quadrant species also creates complicated relationship on board. You don't have to constantly look for external problems to solve when they are living in the room next to you.