The ability to create a new Person within the Gramps Web Family editor screen seems like a very reasonable Feature Request.
However, unlike Gramps which can stack a threaded (hierarchical) series of “work in progress” object editors, Gramps Web is browser-based and is very linear. It cannot have a series of incomplete forms that feed into each other.
I was wondering why I could not find the other recent posting with the same question.
It wasn’t in the Gramps Web category… it was in the International: French category: A la recherche d'un logiciel multi-utilisateurs