I have an impression that some countries create their tentative WHS lists without taking care of justification and not aiming to really nominate the places for inscription in the future. It seems you be the case with Tet el Bad. The whole place is a small, abandoned stone coffin, located behind the assembly hall of northernmost village on Babeldaob island. It is a solid one hour drive from Koror. I cannot see any outstanding universal values of such an object, especially that it's meaning is not fully researched yet. Surprisingly, very close to the coffin are famous stone monoliths, much nicer and more worthy to visit. Looking from my naive unprofessional perspective, it might be much better to nominate these stones or mix the nomination with Tet el Bad.