For a WordPress plugin, I can’t go beyond about 740 pixels wide, at least on the theme I use. Before I settled on this particular layout, I tried a different design with 4 columns for the grand-parents, but I wasn’t very satisfied with that. I’ll have to think about your suggestion of vertical ordering of siblings and children. I also want to make sure that the design is relatively mobile-friendly, something that the Narrated Web Site is not.
Regarding naming style, since most of the people in my database were born in the Netherlands, I normally follow Dutch conventions. For example in Dutch legal documents, women are always referred to by their maiden names. That makes research must easier since you never have to guess if a surname is a maiden name or married name in any document. So I never worry at all about married names.
One thing these pictures do not show is the list of alternate names. With the abolition of patronymic naming in the Netherlands in 1811, many people in my database were referred to by multiple names.
Nicknames are also interesting in the Netherlands. Often, a person is known by others primarily by his nickname. For example, I always knew one uncle by the name “Joop”. It wasn’t until after his death that I realized his name was really “Johan”. I like the idea of italicizing the nickname, though.
Regarding tab names, yeah, I’m also not too crazy about “Home”. I started with “Summary” for that tab, but perhaps “Families” would be better. I like your suggestion of “Timeline” instead of “Events”.
Starting with a note of a specific type is an interesting idea. But one thing these images do not show is that if the person has any notes, a “Notes” tab will appear.
By the way, while debugging, I came across this interesting case of consanguinity I didn’t realize before. Peter Berendsen and Maria Theodora Jansen van Galen were seventh cousins! As far as I can tell, that’s the most distant case of consanguinity in my database.