I like the shape of the top bit, but as Pete says, the foot is way too small, especially for a sturdy stem like this one. It just looks out of balance.
With a hard timber like yew, you can make the stem at least 1/3 thinner than it currently is, that would also improve the balance (but the foot would still be too small. Generally it's a good idea to have the foot just slightly smaller than the top.