I really like the idea behind this. Plotting routes for the different groups is neat, and there are some interesting choices about balancing information gathering versus time.
As you said, I did encounter some bugs. The big one is that if you plan an expedition, then cancel it, you then plan the next expedition from the point where you cancelled.
I missed that I could move the map. I thought it was a one-screen game at first. After restarting, I saw that moving with WASD was included in the tutorial, but I wonder if it would be better to introduce that after the player reaches the first destination.