I'd just remove those sharp corners until "they look good". Now, doesn't that sounds vague?
But honestly. How would the wood 'know' where this sharp corner, that is indeed only dead weight, ends? Where does the limb start contributing in energy storage and how would you determine that?
I normally round the corners of a rectangular cross section to about the radius of a small pea. So in this case, I would remove the triangle until I can make half a pea sized edge.