Thanks a lot everyone
I agree, I would too, but he already has trouble holding the shield as is, so making it larger would definitely form a problem. and I wasn't really sure how to make it larger without making it to plain and technic-y. So maybe I'll make it larger in the future but not right now.
It seems my referencing for Roman spears was off, thanks for the correction I will fix it in the future.
I isn't a particularly novel design, use it all you want.
I know, I just like the look of pilum better, but then again as Mythgaurd pointed out my reference for that was off, so maybe I'll end up changing it to a gladius later.