Not really, the idea is that these were more like a mesh on top of these weapons.
Besides the fact that there are more weapons is the opposite of simple, it makes the selection of equipment more complicated.
What this does is that the equipment you use is simply enchanced, as we mentioned both a polearm or a spear could be transformed into a scythe.
The same with other weapons with transmog, the only thing that was open to change would be the top mesh for another color.
Or you can easily make the mesh that turns the object into something customizable
But that wouldn't be similar as crafting different type of weapons. I don't know if I understand it correctly, what I understand is that you take a bow from a raid and through an enchantment you transform it into an harp with special characteristics (in case of a bard).