>>20471873I think Aegislash is purposefully supposed to represent a huge change in shape and design from Honedge and Double (which look like longswords; the type of sword that many knights used in medieval times)
Aegislash's sword features are much more cartoonish and warped after using the Dusk Stone to evolve. The grip is obviously much too big for any person to hold like a sword, though the blade is probably still sharp enough to cut with enough force behind it.