We realize that this is a feature that quite a few users want, and are currently contemplating the best possible scenarios, also taking into account current limitations of how Weava currently functions (see bullet point #2).
Keyboard shortcut: E.g. similar to how you can disable/enable the highlighter with Alt+S (Option+S for Mac) and pin the sidebar with Alt+P (Option+P) and open/close the Weava sidebar with Alt+Shift+S (Option+Shift+S) there could be a keyboard shortcut that saves the website/pdf you are on. And keep in mind that these shortcuts are customizable in your own personal Chrome extension settings.
Option on pop-up: An option to click "bookmark" (e.g., a star icon) on the highlighter pop-up. This will require you to select some text however for the pop-up to appear.
If you have specific thoughts and comments about a Read Later functionality, please do share more details with us through the following form: https://airtable.com/shrQWJhyIjPd4ZA2B
How pocket does it is fine I think. This would help when I find interesting sources but I don't have time to read or sort it at that moment.
I would welcome an option that would "archive" the page so that it changes in the actual web page, or deletion of the web page, would not affect what I've highlighted and noted.