I wonder why it was left out in the first place when they could easily and quickly have just added it as an option. It's not like it would not appeal to as wide an audience if a less immersion-breaking travel system was made as an option to go along with the default instant fast travel.
Why leave such a major gameplay aspect of the game to the modders? I am quite sure that there are many console users who would also prefer a more Morrowindish travel system.