chief_chaman478
Corridors are situational, personally I find myself using double walkways when I need to move power around and only using corridors on smaller ships or to power ammo factories.
The rest of my comment:
No corridors or walkways to efficiently move power around.
I'm referring the logistics. For example: if you mouse over the small laser at the front, you can see that the nearest source of power is 50m away through corridor, four shield generators, three quarters, two missile storages, an FTL drive, and a large cannon. Admittedly, I'm picking the worst example I could find, but it does examplify the underlying problem.
Routing power through rooms is less efficient and more crewpower intensive then using a corridor, which in turn is less efficient then using a double wide walkway. Small reactor-based crafts can get away with no corridor or walkways by having the reactor touching everything or only going a short distance through a room, which saves weight in corridor at the cost of losing out on the cheaper power provided by larger reactors. Outside of some ion setups, mediums and larges can't do the same because everything they power doesn't fit next to them.
Oh, and also:
Hatter
15. Could consolidate bunks into corridors