Well, the lack of cross piece on the guard makes it appear to be more of a Viking type sword than the one shown in FOTR. Of course when Tolkien says "reforged", what does that mean? I figure they'd have to heat the shards white hot, pound the hell out of them to weld the pieces together, add back some carbon that would get burned out in the process, and then a reheat and quench in oil, water, or a live body for temper. And without the addition of a little magic, the finished product wouldn't be nearly as good as its previous incarnation. While all along here, I've assumed the hilt wouldn't be changed in any way.
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