I know it's not a huge deal but touch id is less secure than a good password, so it's not a complete solution. You also can't use touch id in all circumstances... It's actually quite inconsistent in that regard.
The watch is usually how I unlock my computer, but I'm surprised to hear you're underwhelmed by touch ID, as in my experience the touch ID is very accurate and quite fast (and I use it multiple times a day for authorization of things, especially unlocking 1Password).