Tbh, I find it irrational. Look, you have 2 one-handed swords. One-handed means that you can hold each with a single hand. Then you stick them together to create a two-hander, but only one half of it is used, while another blade is attached on the opposite side just for the looks. Now you need two hands to use a sword that could be used with one hand, with the additional chance to pierce your own chest with the second blade. It would make more sense if it was a double-sided sword, like those from SW, but here's another question - do double-sided swords make sense at all?