Q:

Can more of the functionality of the old envelope be added to the new drop-down menu?

Buried deep in the now deleted Eeeek post, I had a well-hidden feature-request. Grace Note encouraged me to make it a real feature-request, so here it is. The new drop-down menu is nice, but some crucial functionality of the envelope is missing:
I'd like those numbers behind "revisions" and "favorites" (and maybe also "reputation") clickable! After clicking I'd like to see, e.g., the list of recent favorite changes that at the moment can still be found on the /recent page. Moreover, one very important column is missing: I don't care so much for "today", the first column should be "since last visit". This was the greatest advantage of that envelope; it brought me up-to-date efficiently.
Finally, I sorely miss the "orange envelope notification" of changes in my favorites. This was a quick way for me to check if something important happened here on meta.SO. How can I do that in the future? (This part is not yet completed, unfortunately, although the /recent page together with it's nice "favorites" tab is going to die very soon.)
UPDATE (Mar 17): The numbers for reputation are now clickable. The page behind the link shows even more details than /recent. Moreover, if you click on "reputation" (in the left column), then the changes since the last visit of that page are highlighted (which is similar to what /recent did), so the reputation part of my request could be considered as completed. Nice!
Tim Post had an additional idea: Would it be possible that "the reputation link indicated somehow that there were unviewed reputation changes"?
Mar 18: Another thing that's missing from the /recent page is the "revisions" tab that notified me of other users editing my posts (as opposed to the "revisions" tab in my "activity" that shows posts I edited). For example, now I didn't get any notification that Marc Gravell had tagged my bug report status-completed.
UPDATE (Mar 30) Either I was completely mistaken here, or it has now been implemented that clicking "revisions" immediately shows me the recent revisions that happened to my posts. Nice! Unfortunately I don't get a clear notification anymore, but I can get used to that.

A:

The last time you clicked on the reputation and responses tab on your user page are tracked, like so.

The indicators tell you how much rep, and how many responses, since the last time you clicked those tabs.

