Hey BHY4A!
Well, a hoe made of any material other than wood or gold does have higher attack speed than a sword, so that does make sense. I tested with a wooden hoe and it does pick the sword in that case, so the speed calculation does seem to be working correctly.
The idea of a "Damage per second" option has come up once before in this thread (and I have it noted down on my ideas list), but it seems we don't have a formal suggestion thread for it right now. Since your post doesn't really look like a question about how to use Wurst, I'll just move it from there to the suggestions category. That way people who also want this feature have a place to vote for it.