I very infrequently edit my company’s website and invariably when I come back to it, I spend a lot of time figuring out why I changed certain settings. I do have to say that having Elements highlight which settings are changed from default is a nice touch in this regard.
It would be neat if we could have notes saved directly in the elements file that wouldn’t be visible on the published page. Notes for the site, each page, and for each component. In particular, components would help me as I’m never quite sure why certain options are on/off 
Just a nice little QoL improvement when coming back to edit a site after a year plus. I can just save a text file along side the elements file, but it would be nice to have everything in one place.