I understand very well the intention of Epic by giving us few very versatile tools and let us exploit them as we like.
If they had to build a special character class for quads, they will have to do it again with flying creatures, then for the fishes…
And someone will create a dragon some day !
etc.
We have to learn to make what we want with elements that are shared by any construction, like playing with lego 
In a way, that’s fun ^^.