Hallways that are either long or narrow make it very difficult to advance on an opponent waiting at the other end, so one that incorporates both of these elements makes for dreadful combat.
I agree, I can't really see this being fun to play, more frustrating than anything. It would be better to have the train waiting at a station with all doors open, that way you have the option to leave the train should any situation make it necessary, also having a shoot-out in a train station would be pretty cool. Sticking to the original is OK, but sometimes it's necessary to advance over the original to keep it new and exciting.
