Yes! Having a way to enter a new item (whether a link or some copied text or just some typed-in text) would be a great addition. I have missed not being able to quickly add items to Moo.do/Legend since I switched from another outlining app earlier this year.
It would be most useful if we could choose where to place it (having some kind of access to the list of documents or even within the document hierarchy), but I’d be happy if there was just a designated “inbox” document/location that everything would show up in. Then filing things in their proper place could be done later.
Besides a Chrome/web extension, I’d also like to see an Android helper where we could share the link/text with Legend (again, just to an “inbox” would be enough).