From looking at another Fierce Deity mod that I use, the sword looks pretty flimsy when scaled down:
http://puu.sh/gcDxO/9987783056.jpgMaybe this is just a reskin or something of the default sword? Either way, I've never really minded the sword and have always liked the fact that it's a part of the skin anyway instead of just being the regular sword. I don't know about anyone else, but I'd say a scaled down helix sword is better than none t all.
Also, here's how it looks with trails.
http://puu.sh/gcDrd/79a4715ae7.jpg