I kinda think this is cool.... u could import the old maps into the JK editor, and have all the proper proportions of the original maps. Then u could just use them as blueprints for updating it ( just for the proper scales of things, etc.), but be able to redesign it for the new style of play w/ JK2. [in essence the only thing u could be using it for is the proper size of things].
Personally, i think it would be awesome to see the old maps remade for jk2, and with redesigned puzzles for the force powers, etc.