Do you think the enclave was, well, destroyed enough? Sure a few stones were displaced and the lower level had some cave ins, but if it was really attaced by Malak and his full might, would it not be wiped completely from the map? I mean, the battle would be terrible as jedi defended themselves, and Malak, as a sith, had already destroyed Tarris, and would not hav e balked at destroying Dantooine. I mean, come on! The enclave lookes like it had been abandond for 500 years, not just recently destroyed!