It would be EXCELLENT to be a weapon navi, and it'd at least be entertaining! Not even taking into account the kind of ridiculous shenanigans that could happen if he could retain Turn().

But play it! It's maybe 3-6 hours long at most. It's very quick if you play it - the story's super easy to digest, and it has very little extra stuff other than a lot of lore and chatter from Boxer.

Plus, it does some incredibly interesting things, like Boxer not having a canon name, face, or history, which I like quite a bit.