It's more of a wishlist item for the next game, but here goes anyway.
I would love it if the "Order" tree was managed like an actual investigation.
Lore-wise, at the beginning of the game, Eivor has no idea how many members are in the Order, nor what their relationships are.
It would then make sense that the information about members appear as free-floating items on an otherwise blank board.
Somewhat like what you can see on TV shows, where the mugshots are pinned on a board, linked together with string, and moved around when new information appears.
(not saying this should include actual mugshots and string, it's just an example 😛 )
Correspondance between members would make the corresponding links and new members appear on the board.
The current implementation kinda feels like a Panini sticker album, which is fun, but could be so much more...