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Originally Posted by mariusgmioc
Not likely.
It is not only the geometry of the crossbar/crossbars that determine the stability in the hand, but also the extended longitudinal arms that contribute in a major way.
Those long arms are there with a purpose and no matter how flat/rectangular the transverse grip would be, it simply cannot ensure enough stability alone. Without the long arms, the slightest misalignment of the thrust would not only be ineffective, but also can have disastrous effect on your wrist.
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Marius,
As you can see, there are good and old examples of Katars with very short side projections. One could argue that the long ones might have served as minimalistic gauntlets, but you would agree that those were not very effective. Also, since they were positioned on the lateral sides of the forearm, their ability to minimize bending of the wrist was practically nonexistent. To control for it, one would need rigid support of the dorsal side of the forearm. Indians might have mutated their katars into hooded examples and, eventually, into Patas to correct it.
But, as usual, it was the fighting function that took the precedence.
Short lateral arms or long ones would not change the biomechanics of the thrust, i.e. the stabbing function.