Hi Wayan,
I would second Kai's cautious words here. It seems you don't really know enough about Moro kris to be passing such judgements. Pehaps you should spent some time with the search function of this forum and check out the level of skill and artistry that can be found in the Moro kris before making any further comments. My own personal tastes run more towards the Indonesian keris myself and i have a very strong affection for Bali blades in particular. But i also have 3 Moro blades in my collection which i quite enjoy and the quality of their workmanship is hardly inferior. Moro blades do tend to be far more functional and were used as actual weapons of war, unlike most Indo keris. But their owners also saw them as having a powerful mystical/magickal side. This is warrior magick. I wouldn't assign a better or worse title to it. I don't think you will get very far on this forum disrespecting or diminishing other peoples cultures. The Moro (and people who collect their weapons) take their kris very seriously. It is a powerful weapon both practically and spiritually, though perhaps not in the same complex and variant modes as the Indo keris. They don't use complex pamor patterns, but there is a beauty to the pure functional form of them. AS to your question about the tang, the Moro kris tang is rectangular, unlike the round Indo ones. The blade is also additionally secured by one or two stirrups called baca-baca. I can assure you there is NOTHING fragile about this construction and the tang is not likely to bend under the fiercest of combat situations.
Very nice keris that you linked to. Neither, however, is "flawless in their execution". The hilt on the second one is exquisite though. Looks like recent work to me.
BTW, you will also find figurative hilts from Java, Madura and Sumatra and the so-called "kingfisher" hilts from the penisula areas.