Lots of space down at NASA/CCAS, and nearly all of the original launch pads are still intact (but in a state of decay). There is historical value to everything, but it must be weighed against the need for modern facilities. Sure there were some historic launches from MLP-2, but IMHO that does not justify turning it into a museum. There's a nice museum (and rocket garden) just a few miles away at the Visitor Center.