Hey Neal, got to agree with you. The full 3d walkable interior is the most significant improvement in subsim realism since the partial 3d interior was brought in in sh3. It cranks up the immersiveness by a significant degree.
"Tedious" is a strange adjective to use in the context of a subsim where the whole object of the game is to search the oceans for weeks to get a shot at sinking something, only to start over and over again.
I suppose it could get tedious to have to "walk" all over the sub, like a real captain instead of being able to teleport from station to station, like in Star Trek.
I also find it tedious to have to commute to work everyday. It would be nice to be able to teleport to the office and back like they do in "real" subsims.