I find the 'duplicate' lineage far more annoying than not having the tree "aesthetically pleasing". It's driving me kind of nuts. A lot of the lineage problems that come with a more complicated family tree I think would be solved if you could customize the placement of where the husband/wife/parents are (left side or right). It almost breaks and it just feels like it really doesn't have to.
For context: This is for a fictional tree for a royal family, not my own.