You were definitely savy in putting the majority of your valuables in the safe. This could have been a horrendous story otherwise. I think this story just brings it home just how careful a traveler must be even in the comforts of a luxury hotel.
I would also add that if you have new purchases such as clothes, cosmetics, etc..., you should consider keeping this locked in your suitcase. I've learned my lesson ages ago when a staff member at the Four Points Miami took new cosmetics/perfume from my wife's suitcase. Once stolen from your hotel room, most hotels will assume no responsibility. Always lock up anything of value.